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Re: Prep for painting over epoxy primer? Sitting a while [Re: Dave Watt] #1495004
09/03/13 12:48 PM
09/03/13 12:48 PM
Joined: Feb 2003
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Rust Belt, SW PA
Silver70 Offline
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I do the body work over epoxy. I've seen too many cars with putty on bare metal that had rust under the putty.


68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
Re: Prep for painting over epoxy primer? Sitting a while [Re: Dave Watt] #1495005
09/03/13 01:26 PM
09/03/13 01:26 PM
Joined: Dec 2007
Posts: 1,572
Jacksonville Florida
elitecustombody Offline
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Quote:

Another hi-jack:
Some will put filler on bare metal, block, then prime. Others will prime the whole body, then start the filler work.
What do the professionals think?




Always do it over epoxy.Filler is like a sponge,it will absorb moisture and cause rust under it .Epoxy blocks moisture . That way you can have a piece of mind knowing that you won't have to deal with rust issues down the road

Re: Prep for painting over epoxy primer? Sitting a while [Re: elitecustombody] #1495006
09/03/13 01:49 PM
09/03/13 01:49 PM
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Florida
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mopar346 Offline
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To add another question to the mix.

Do you osphos under the epoxy or not?

In the case that you striped the paint with a DA as oppose to blasting, would you epoxy or self etch? Even with blasting I like to osphos and DA would leave more potential for rust than blasting, I have been in the practice of using osphos even on blasted areas. Any thoughts?


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Re: Prep for painting over epoxy primer? Sitting a while [Re: elitecustombody] #1495007
09/03/13 04:12 PM
09/03/13 04:12 PM
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Atlanta Indiana
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Dave Watt Offline
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I do filler work over the epoxy too, just asking to see what others think about it.
I've seen a lot of builds on TV where they put the filler right onto the bare metal. Most of the cars I wouldn't want because the metal prep is poor.

Re: Prep for painting over epoxy primer? Sitting a while [Re: mopar346] #1495008
09/03/13 04:35 PM
09/03/13 04:35 PM
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Posts: 654
MN
astrobuf Offline
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MN
Quote:

To add another question to the mix.

Do you osphos under the epoxy or not?

In the case that you striped the paint with a DA as oppose to blasting, would you epoxy or self etch? Even with blasting I like to osphos and DA would leave more potential for rust than blasting, I have been in the practice of using osphos even on blasted areas. Any thoughts?




Epoxy does not self etch. If you ahve pitted rust, you must strip it, either sandblast it all off, or use a conversion coat such as Ospho. IT's critical to follow the directions carefully though as leaving dried Ospho on the surface can lead to primer failure.

Astrrobuf


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Re: Prep for painting over epoxy primer? Sitting a while [Re: astrobuf] #1495009
09/03/13 04:46 PM
09/03/13 04:46 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
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I do use the dupont and ppg wash(acid) primers over freshly sand blasted metal, have been for a long time. It provides extra grip I believe if I'm going to all the trouble of sand blasting.

615s variprime is the dupont paint and PPG make 2 kinds and only one is OK for blasted metal, it works good as I have been painting trucks since the 90s and keep my trucks for years.

IMO there's nothing better than freshly blasted metal to paint, I have never used any thing under my acid wash primer and then epoxy on top of that. I never even touch the metal after blasting before wash primer. I usually blast it and paint it the same day.

Re: Prep for painting over epoxy primer? Sitting a while [Re: Challenger 1] #1495010
09/03/13 07:28 PM
09/03/13 07:28 PM
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Florida
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How do you clean after blasting? Meaning how do you get all the blasting dust off.


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Re: Prep for painting over epoxy primer? Sitting a while [Re: mopar346] #1495011
09/03/13 07:41 PM
09/03/13 07:41 PM
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Cincinnati, Ohio
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I used the blaster with no sand to blow it off. I use a diesel 100cfm compressor that blows a lot of air when I sand blast. Then blew it off again with shop air. Then paint it.


This is a surface that was pressured washed clean of all grease and oil before I sand blasted. You always want to remove that first. Because there's nothing worse than blasting grease and oil into the pores of bare metal and then try to get it grease free, almost impossible. And after sand blasting it's pretty rough and even a DA sander is not going to get to the bottom of the metal because it's textured after blasting. Perfect for paint adhesion.

Re: Prep for painting over epoxy primer? Sitting a while [Re: Challenger 1] #1495012
09/03/13 08:03 PM
09/03/13 08:03 PM
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Florida
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mopar346 Offline
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Florida
Do you wipe with a solution of some sort? I am currently using Windex with 10% acrisol in it and then a tack rag.


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Re: Prep for painting over epoxy primer? Sitting a while [Re: mopar346] #1495013
09/03/13 09:00 PM
09/03/13 09:00 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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NO!! nothing, you are only making it worse by trying to anything after blasting, it's ready for paint at that point.

That's crazy to spray anything on bare blasted metal besides paint, imo.

Re: Prep for painting over epoxy primer? Sitting a while [Re: Challenger 1] #1495014
09/03/13 10:25 PM
09/03/13 10:25 PM
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Florida
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mopar346 Offline
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Interesting, I am referring to when painting over primer, never painted straight on bare metal except for small parts, brackets and such, never had a body good enough to allow that.


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Re: Prep for painting over epoxy primer? Sitting a while [Re: Challenger 1] #1495015
09/03/13 10:29 PM
09/03/13 10:29 PM
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Posts: 1,896
New England
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New England
Great information going on here. Keep it going, so lets say you have a slow paced project and can;t go too far at once. I'm getting some major metal work underneath now to an old SS/E A12 car. If my car needed some minor dent removal to the shell in various locations such as quarters, too, floor, would you dolley that first before blasting, or after? And once you have blasted and primed with epoxy, started filling and sanding filler, whats the next coat over that initial epoxy? I am assuming you will burn thru the epoxy while sanding the filler, maybe need more filler, etc. So to avoid filler over bare metal you would add more primer? Gets confusing to think about for the amatuer body man. personally I am hoping to sub out the blasting and first epoxy step, then bring car home to save money on bottom, inside, and possibly engine compartment and trunk....

7838707-Frame1.jpg (170 downloads)

WANTED : ...A New Sponsor or Winning Lottery Ticket 69 A12 road runner ,Q5, post coupe, 4 speed, former Drag car restored to "Driver" condition in the early 90's, Showing some Patina. SS/E Track Record Holder 1980 10.40 @ 130mph
Re: Prep for painting over epoxy primer? Sitting a while [Re: Q5_Ed] #1495016
09/03/13 10:31 PM
09/03/13 10:31 PM
Joined: Oct 2003
Posts: 1,896
New England
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quarters

7838712-IMGP5541.JPG (318 downloads)

WANTED : ...A New Sponsor or Winning Lottery Ticket 69 A12 road runner ,Q5, post coupe, 4 speed, former Drag car restored to "Driver" condition in the early 90's, Showing some Patina. SS/E Track Record Holder 1980 10.40 @ 130mph
Re: Prep for painting over epoxy primer? Sitting a while [Re: Q5_Ed] #1495017
09/03/13 10:55 PM
09/03/13 10:55 PM
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Florida
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Ed, do you have any pictures of that paint job before the sand paper, the design/pattern I can see looks fricking awesome!


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Re: Prep for painting over epoxy primer? Sitting a while [Re: elitecustombody] #1495018
09/03/13 11:39 PM
09/03/13 11:39 PM
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In The Hills
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Quote:

Quote:

Another hi-jack:
Some will put filler on bare metal, block, then prime. Others will prime the whole body, then start the filler work.
What do the professionals think?




Always do it over epoxy.Filler is like a sponge,it will absorb moisture and cause rust under it .Epoxy blocks moisture . That way you can have a piece of mind knowing that you won't have to deal with rust issues down the road




thanks for that info!!

A gentleman (who does fleet vehicle bodywork as a profession, and restorations on the side) has suggested using fiberglass reinforced filler at the seam where the 1/4 panel joins with the roof. Ok to go this route?? or is using lead as a filler the way to go??

Re: Prep for painting over epoxy primer? Sitting a while [Re: mopar346] #1495019
09/04/13 09:59 PM
09/04/13 09:59 PM
Joined: Oct 2003
Posts: 1,896
New England
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I took several paint layers off with a citrus stripper, that pattern is a lace over the original Q5 on the bottom layer. Amazingly preserved under all the race car repaints. I do have a few pic's from back in the day.

7839939-IMG_0012.jpg (431 downloads)
Last edited by Q5_Ed; 09/04/13 10:16 PM.

WANTED : ...A New Sponsor or Winning Lottery Ticket 69 A12 road runner ,Q5, post coupe, 4 speed, former Drag car restored to "Driver" condition in the early 90's, Showing some Patina. SS/E Track Record Holder 1980 10.40 @ 130mph
Re: Prep for painting over epoxy primer? Sitting a while [Re: Q5_Ed] #1495020
09/04/13 10:05 PM
09/04/13 10:05 PM
Joined: Jul 2007
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Florida
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mopar346 Offline
Let me tell ya about fat chicks!
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Florida
I don't think it loaded please try again or e-mail them to me. mopar346@yahoo.com

I think this is the car.

7839945-Q5Racer.jpg (154 downloads)

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Re: Prep for painting over epoxy primer? Sitting a while [Re: mopar346] #1495021
09/04/13 10:20 PM
09/04/13 10:20 PM
Joined: Oct 2003
Posts: 1,896
New England
Q5_Ed Offline
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Ya thats the lace on the side back in the mid 70's. Don't have any good close ups, but the shop photo is pretty much it. It has not been stripped yet or will it be anytime soon.


WANTED : ...A New Sponsor or Winning Lottery Ticket 69 A12 road runner ,Q5, post coupe, 4 speed, former Drag car restored to "Driver" condition in the early 90's, Showing some Patina. SS/E Track Record Holder 1980 10.40 @ 130mph
Re: Prep for painting over epoxy primer? Sitting a while [Re: Q5_Ed] #1495022
09/04/13 10:29 PM
09/04/13 10:29 PM
Joined: Jul 2007
Posts: 11,836
Florida
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mopar346 Offline
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Florida
Awesome car!

Back to topic, epoxy don't self etch, filler over epoxy, prime and block til your hands are numb and block once more.


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Re: Prep for painting over epoxy primer? Sitting a while [Re: jughed] #1495023
09/04/13 10:35 PM
09/04/13 10:35 PM
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Posts: 18,632
jersey shore
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jersey shore
Quote:

Quote:

Quote:

Another hi-jack:
Some will put filler on bare metal, block, then prime. Others will prime the whole body, then start the filler work.
What do the professionals think?




Always do it over epoxy.Filler is like a sponge,it will absorb moisture and cause rust under it .Epoxy blocks moisture . That way you can have a piece of mind knowing that you won't have to deal with rust issues down the road




thanks for that info!!

A gentleman (who does fleet vehicle bodywork as a profession, and restorations on the side) has suggested using fiberglass reinforced filler at the seam where the 1/4 panel joins with the roof. Ok to go this route?? or is using lead as a filler the way to go??




go with lead

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