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Re: How to handle Runs in clearcoat ?
[Re: MileHighDart]
#1214063
04/11/12 12:30 PM
04/11/12 12:30 PM
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Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
herkamer
pro stock
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pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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I have a nib tool but haven't had a chance to use it. Think you need a pretty steady hand so you don't gouge the rest of the surrounding paint. I usually wet sand them out if they aren't bad, but using 400 will be very tough to get the sand scratches out. I would think about starting with 2000 and if need be step down to 1500. With clear, I always start fine and work coarser if it's not doing the job. I have some compounds that claim they will buff out 1200 grit scratches but I'm not quite that optimistic without having some practice panel to try on first.
Matt
69 Dart Swinger 340
83 W350, Megasquirted with 46RH
Old news: 72 Demon street/race mobile
Latest: 70 Duster backhalf car
and even more
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Re: How to handle Runs in clearcoat ?
[Re: MileHighDart]
#1214065
04/11/12 12:58 PM
04/11/12 12:58 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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If you have steady hands use a single edge razor blade .... Grip the blade between the thumb & index fingers of both hands, center the blade, rest the heel of you hand on the car to help steady your self & take small shaving cuts off the top of the run... If you take an aggressive cut it may dig to deep so go slow... Al your want to do is get it close, that last little bit will sand out... Practice helps but ya gotta learn sometime & today is your day... Shaving is best done the day after you spray, the longer you wait the harder it gets...
FWIW I use the blade straight but I use a layer of masking tape around the corner at each end of the blade...
My buddy likes to put a slight bend in the middle of the blade so he has less blade close to the paint & better control of the cut...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: How to handle Runs in clearcoat ?
[Re: MileHighDart]
#1214066
04/11/12 01:09 PM
04/11/12 01:09 PM
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Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
Moonraker
mopar
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mopar
Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
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If your runs are heavy and have "fingers" a nib filer will come in handy, but be VERY careful when using it because the clear coat that has ran on you will take longer to cure than the rest of it. If you try to file it too soon you will run into real problems. Same goes for sanding real heavy runs. If your runs are smooth sanding will be fine there wont be a need to use a file. If your runs are heavy try the file or you can use 400-600 to carefully knock them down, I would stop right before you become "level" with the rest of the clear and switch to 1000-1500 to work it flat then 2000 to finish it off before you buff it. Smoother/lighter runs I would use 1000 to to work heavier part of the run down switch to 1500 to work it flat and then 2000 to finish it off before buffing. Just remember to work it down in stages more or less this will save sanding time and the time needed to buff it out as heavy scratches are alot harder to remove. Take your time and save yourself the headache. 
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Re: How to handle Runs in clearcoat ?
[Re: Moonraker]
#1214067
04/11/12 01:23 PM
04/11/12 01:23 PM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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one thing I don't see mentioned yet, is if you try to sand it out alone, you can burn through the clear in the low spots on each side of the run, before the run itself is even with the rest of the clear.
cut the run with a blade or file, THEN sand and buff it out.
**Photobucket sucks**
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Re: How to handle Runs in clearcoat ?
[Re: 1_WILD_RT]
#1214068
04/11/12 01:28 PM
04/11/12 01:28 PM
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Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
Moonraker
mopar
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mopar
Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
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Quote:
If you have steady hands use a single edge razor blade .... Grip the blade between the thumb & index fingers of both hands, center the blade, rest the heel of you hand on the car to help steady your self & take small shaving cuts off the top of the run... If you take an aggressive cut it may dig to deep so go slow... Al your want to do is get it close, that last little bit will sand out... Practice helps but ya gotta learn sometime & today is your day... Shaving is best done the day after you spray, the longer you wait the harder it gets...
FWIW I use the blade straight but I use a layer of masking tape around the corner at each end of the blade...
My buddy likes to put a slight bend in the middle of the blade so he has less blade close to the paint & better control of the cut...
This works too but scares the crap out of me when I do it  . Luckily I seldom get runs in the clear anymore. Always loved seeing that beatiful wet shine right after spraying only to come back in the booth 5 minutes later and see runs forming in it. 
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Re: How to handle Runs in clearcoat ?
[Re: 70Cuda383]
#1214069
04/11/12 07:38 PM
04/11/12 07:38 PM
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Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
Moonraker
mopar
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mopar
Joined: Jan 2003
Posts: 666
Anywhere the British Secret Se...
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Quote:
one thing I don't see mentioned yet, is if you try to sand it out alone, you can burn through the clear in the low spots on each side of the run, before the run itself is even with the rest of the clear.
cut the run with a blade or file, THEN sand and buff it out.
This is true. I have a hard plastic block I use on heavier runs to help prevent cutting into the lower parts of the clear before the run is knocked down when I'm sanding. 
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Re: How to handle Runs in clearcoat ?
[Re: bri440]
#1214071
04/11/12 10:48 PM
04/11/12 10:48 PM
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Joined: Jan 2003
Posts: 7,798
Lyons, CO
MileHighDart
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,798
Lyons, CO
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Well I was just out in the garage giving this a try. I used a single edged razor blade and I put two wraps of masking tape around the ends/corners. So the blade can basically slide on the surface riding on the masking tape, the blade in the center scrapeing the run. Works pretty good, but I noticed the deeper you go into the run it was still a little soft so I stopped and I'll continue in a day or two. Got about 1/2 the thickness of the runs off. Thats pretty nerve racking though, scrapeing a razor blade across a brand new paint job  but it seems to be working. Thanks for the tips everyone. 
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Re: How to handle Runs in clearcoat ?
[Re: Mopargnome]
#1214073
04/12/12 02:05 AM
04/12/12 02:05 AM
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Joined: Oct 2005
Posts: 6,048
Back home in PA
BulletBob
master
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master
Joined: Oct 2005
Posts: 6,048
Back home in PA
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Quote:
I did the razor blade trick on a friends car, right in front of him, the day after painting it. He was quite nervous until it was all buffed out. I was laughing the whole time!
I did the same He freaked out totally after his buddy who claimed that I was doing it all the wrong way & said that I should be sanding the run out.
I stopped & explained that the guy who has never had any type of automotive job neede to sand the couple runs out & buff it himself.
He sanded them smooth to the touch but was still visible in the light & explained that that was why it's bad to get runs because thats the result.
I explained to him that he wasn't a painter but a Paint Rep (The guy who tells you how to paint but never has done it)
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Re: How to handle Runs in clearcoat ?
[Re: Moonraker]
#1214074
04/15/12 12:59 AM
04/15/12 12:59 AM
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Joined: Nov 2003
Posts: 1,881
Pittsburgh,PA
RTSrunner
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,881
Pittsburgh,PA
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Quote:
Quote:
one thing I don't see mentioned yet, is if you try to sand it out alone, you can burn through the clear in the low spots on each side of the run, before the run itself is even with the rest of the clear.
cut the run with a blade or file, THEN sand and buff it out.
This is true. I have a hard plastic block I use on heavier runs to help prevent cutting into the lower parts of the clear before the run is knocked down when I'm sanding.
I use a fine nib file and then start with 800 grit wet paper on a hard sanding block or paint stick.Work slowly and sand lightly,too much pressure and you will sand through the surrounding paint.Then move to 1000 grit and continue finer and buff.Wizards buffing compound is amazing,slow speed results and fast too.
RT
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Re: How to handle Runs in clearcoat ?
[Re: RTSrunner]
#1214075
04/15/12 01:44 PM
04/15/12 01:44 PM
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Joined: Jul 2008
Posts: 403
NE Ohio
71 FJ6 Charger
mopar
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mopar
Joined: Jul 2008
Posts: 403
NE Ohio
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I have many hours showing retards how to use technique to avoid runs. Usually it is a disaster...and we spend more time fixing the "repairs" than working on technique.
Do what you are doing with the razor,(if you have atleast 2 wet coats of clear),then hit them with a rubber block and 600 paper WET. You have to pay close attention to the OUTSIDE area of the run(s),they WILL go through first(less material).Make a few passes,feel it,if it is coming down move to 800,then 1500 then 2K. It is a gradual and slow process,but I have been successful at it scores of times this way without breaking the clear,though it has happened. But only about 10% of the time.
Also try to use a synthetic compound,as it wont take as much down as typical compound will.This is where you usually go through,the buffing part. Syntheticut works awesome for this kind of repair.
Good luck
'71 383HP FJ6 Charger SE
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Re: How to handle Runs in clearcoat ?
[Re: MileHighDart]
#1214077
04/15/12 02:45 PM
04/15/12 02:45 PM
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Joined: Jan 2010
Posts: 1,944
woodcrest, CA
magnum440d100
top fuel
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top fuel
Joined: Jan 2010
Posts: 1,944
woodcrest, CA
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Quote:
So I painted the main part of my Dart yesterday, the roof, quarters, etc.
I was doing great, but ended up with a couple Runs in my final coat of clear.
Should I run out to the bodyshop supply store today and buy one of those nib cutter things and try to shave off the runs while they are still soft ?
Or just wait till the paint totally hard and use a small block and some 400 wet paper.
I'll be colorsanding and buffing the whole thing anyway so not worried about the runs but just wondering whats the best way to handle them.
I use the razor blade method after it dries...
BUT the easiest I've done it was with a piece of masking tape while its still wet. get a length of masking tape, pull it semi taught with the sticky side facing the wet paint. TAP, and I mean BARELY tap the wet run with the tape, and pull away quickly...takes the excess paint/clear with it. It wont be PERFECT but comes out with colorsanding easier.
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Re: How to handle Runs in clearcoat ?
[Re: MileHighDart]
#2698286
09/17/19 02:15 AM
09/17/19 02:15 AM
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Joined: Aug 2017
Posts: 8
Alaska
Johnsnow Kornar
member
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member
Joined: Aug 2017
Posts: 8
Alaska
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So I painted the main part of my Dart yesterday, the roof, quarters, etc. I was doing great, but ended up with a couple Runs in my final automotive Clear Coats of clear. Should I run out to the bodyshop supply store today and buy one of those nib cutter things and try to shave off the runs while they are still soft ? Or just wait till the paint totally hard and use a small block and some 400 wet paper. I'll be colorsanding and buffing the whole thing anyway so not worried about the runs but just wondering whats the best way to handle them. There are numerous factors. It could have been the means by which the paint was blended, what number of coats were applied, how the vehicle was painted (method), what number of coats and sort of clear coat, even the shade of the preliminary can make little contrasts. I painted the hood of my yellow charger off the vehicle and applied all the more clear on it than the remainder of the vehicle and in some lighting conditions, you can see a slight contrast in the shading just from the thicker covering of clear.
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Re: How to handle Runs in clearcoat ?
[Re: HUSTLESTUFF]
#2698311
09/17/19 08:14 AM
09/17/19 08:14 AM
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Joined: Jan 2003
Posts: 1,376
NORTHERN CA
HUSTLESTUFF
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,376
NORTHERN CA
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My suggestion probably wont work seeing you asked in 2012
"Were in it to win it. Anything less will end up being..... A whole lot of fun doing!!" UNLAWFL
RIP UN
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