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09-15-2022, 08:19 PM | #1 |
laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,961
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lacquer primer and base coat?
I believe my old truck has lacquer primer on it. It was sanded and primed a long time ago. Can it now be painted over with base coat/clear coat without problems?
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
09-15-2022, 09:22 PM | #2 |
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Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
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Re: lacquer primer and base coat?
Short answer: Absolutely not.
Longer answer: The solvents in urethane bc/cc are far more aggressive and will "craze" when you apply them. Sand off the lacquer and start over with epoxy primer/urethane primer/bc/cc and you'll be trouble free. To find out out if it's lacquer primer, take some lacquer thinner and wipe it... it will lift the primer onto the wiping rag if it's lacquer primer. Note that applying Featherfill over any primer is only for hacks and should be avoided at all costs.
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So when is this "Old enough to know better" supposed to kick in? My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989 |
09-16-2022, 05:57 AM | #3 |
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Join Date: Dec 1999
Location: Southern California
Posts: 2,704
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Re: lacquer primer and base coat?
At a minimum, I would suggest to scuff and seal with an epoxy sealer to prevent any problems.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
09-16-2022, 09:03 AM | #4 | |
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Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
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Re: lacquer primer and base coat?
Quote:
1) Epoxy Primer is a corrosion resistant coating designed to be only applied to bare steel. 2) The solvents in epoxy primer will attack the lacquer primer causing a paint failure.
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So when is this "Old enough to know better" supposed to kick in? My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989 |
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09-20-2022, 03:29 PM | #5 | |
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Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,165
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Re: lacquer primer and base coat?
Quote:
Now that being said I wouldn't paint over lacquer primer of unknown origin.
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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09-20-2022, 08:18 PM | #6 |
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Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,257
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Re: lacquer primer and base coat?
I just want to add with the unknown of the primer it could very well have rust tracks underneath the primer. I have seen things primed with the laq. primer that rusted under it.
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09-21-2022, 07:22 AM | #7 |
laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,961
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Re: lacquer primer and base coat?
I bought some lacquer thinner and give it a little wipe. It is lacquer primer put on over 25 years ago and the truck has been kept inside our home shop all these years. I think it is PPG brand but cannot verify. I have begun working on the body again and now need primer. Dad and I did body and paint over 40 years ago, so I am experienced spraying enamel and lacquer. Refinishing products are way different now days. And way more expensive!
__________________
Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
09-18-2022, 01:22 AM | #8 |
Senior Member
Join Date: Dec 1999
Location: Southern California
Posts: 2,704
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Re: lacquer primer and base coat?
My friend and painter (45 years painting, painted my truck and others for me) I work part time for said: do a quick wet sand with 500. Use a thinned epoxy primer like PPG DP50 as a non sanding sealer. After spraying wait 20 minutes and apply color.
A side note for the previous post. Painter still uses lacquer primer for spot priming to this day.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 Last edited by Richard; 09-18-2022 at 01:28 AM. |
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