|
Surface Primer?(With a Pic.)
#963818
04/01/11 03:32 PM
04/01/11 03:32 PM
|
Joined: Aug 2008
Posts: 4,072
Mo.
racerx
OP
master
|
OP
master
Joined: Aug 2008
Posts: 4,072
Mo.
|
I sprayed surface primer last year just b4 winter and i thought that it sprayed  fairly well 4 the first time.Well i was wrong  When the primer dry it has that alligator texture to it and wondering what procedure would be best to eliminate this rough texture.Can i just sand with a say (320)then final sand with a (400)  r what will b the best way of tackling this i thought I'll ask here on Mo parts b4 i go any farther.Any help would b greatly appreciated.Thaxx
Last edited by racerx; 04/07/11 08:55 PM.
|
|
|
Re: Surface Primer?
[Re: racerx]
#963820
04/01/11 03:37 PM
04/01/11 03:37 PM
|
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
|
Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
|
Surfacing primer is meant to be block sanded... It's better if it lays out smooth but your gonna be sanding anyway...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
|
|
|
Re: Surface Primer?
[Re: 1_WILD_RT]
#963821
04/01/11 04:36 PM
04/01/11 04:36 PM
|
Joined: Aug 2008
Posts: 4,072
Mo.
racerx
OP
master
|
OP
master
Joined: Aug 2008
Posts: 4,072
Mo.
|
Quote:
Surfacing primer is meant to be block sanded... It's better if it lays out smooth but your gonna be sanding anyway...
Thaxx's 1 wild r/t  that's what I'm thinking I'm trying 2 get photo bucket 2 host a pic but  it's not happening but like said it laid down fairly well i think with no runs,just has that rough texture.
|
|
|
Re: Surface Primer?
[Re: Aero426]
#963824
04/07/11 03:00 PM
04/07/11 03:00 PM
|
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
|
Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
|
Quote:
A DA sander will make the surface smooth, but it won't level it. You need to block sand. There is no free lunch with body work.
Yup, I'd start with 120-150 dry and get it level again.
You used either the wrong reducer for the temp or the wrong proporation when you mixed it. Got to have a pretty good tip size to spray surfacer, 1.8-2.2 or so.
|
|
|
Re: Surface Primer?
[Re: racerx]
#963826
04/07/11 05:40 PM
04/07/11 05:40 PM
|
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
|
Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
|
Quote:
Thaxx's  That's what i was thinking to use a DA to smooth it then follow up with a blocking of #400.
Wrong... You will never get it right that way.
|
|
|
Re: Surface Primer?
[Re: Challenger 1]
#963827
04/07/11 07:41 PM
04/07/11 07:41 PM
|
Joined: Aug 2008
Posts: 4,072
Mo.
racerx
OP
master
|
OP
master
Joined: Aug 2008
Posts: 4,072
Mo.
|
Quote:
Quote:
Thaxx's That's what i was thinking to use a DA to smooth it then follow up with a blocking of #400.
Wrong... You will never get it right that way.
So what will u recommend?your help is greatly appreciated
|
|
|
Re: Surface Primer?
[Re: Aero426]
#963832
04/07/11 09:13 PM
04/07/11 09:13 PM
|
Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
|
pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
|
Quote:
It looks normal to me. Take a black spray bomb and mist a light guide coat on. Then start block sanding grasshopper. On your first prime coats, you are going to sand most of it off anyway.
I was told the same thing by a body man with 40 years of it under his belt. Works good.
|
|
|
Re: Surface Primer?
[Re: AdamR]
#963834
04/07/11 10:37 PM
04/07/11 10:37 PM
|
Joined: Nov 2003
Posts: 1,881
Pittsburgh,PA
RTSrunner
top fuel
|
top fuel
Joined: Nov 2003
Posts: 1,881
Pittsburgh,PA
|
Quote:
Spray it with guide coat and start blocking with 180.
^ Exactly,block it and use it as intended to fill the low spots and surface imperfections.Mix more surfacer and add some slow reducer to help the primer flow.It will give a smoother application when you spray.It will also be easier for you to sand with 360 to 500 grit before sealer or paint.final sandpaper grit is dependent on the type of paint to be applied.What brand and type of primer-surfacer are you using?Epoxy,2k urethane,or other?
RT
|
|
|
Re: Surface Primer?
[Re: racerx]
#963837
04/07/11 11:11 PM
04/07/11 11:11 PM
|
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
|
Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
|
Nope, it(sandpaper) has to be ruff so it cut's and get's the panel straight, it's the only way. If you go to fine right away, it will never get flat and will be all wavey.  Block sand in a X shape and do it for hours, many. Get your self some durablocks and get busy. I have also used homemade blocks to sand with. It don't have to be Durablocks, but they work so nice. Guide coat is a must also. Try it, your'll see.    here they are with a heavy guide coat before blocking.   210 hours worth, to this. 
|
|
|
|
|
