epoxy primer over lacquer primer? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-05-2007, 09:02 AM
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epoxy primer over lacquer primer?

Im restoring a 56 chevy stepside bodywork is complete and truck is ready for paint I was going to shoot lacquer paint w/clearcoat but i reconsidered and now would like to shoot bc/cc. Can I seal the lacquer primer w/dp90? I know that the best thing to do would be to strip the old primer off but I did alot of blocking on this body and shes ready to go, cant stand the thought of stripping. I would like to seal with epoxy and shoot color can I do this?
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Old 01-05-2007, 11:56 AM
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I'm just repeating what I've read:
Lacquer-based primer doesn't seal out moisture the way it should, so it would be better to start over from bare metal. That said, yes Epoxy or even a good 2K primer will 'seal' the lacquer primer IF it has cured enough. I'd personally use a heat-lamp or two and bake all the recently-primed panels for a night each to cook out solvents.
It should be fine, as long as you're not in Minnesota or somewhere like that, let us know how it turns out!!
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Old 01-05-2007, 12:07 PM
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Personally I would take a day with and 80 grit DA and sand the primer off and you have read enough to know all the reasons why.

With that said, if you wish to carry on with your plan epoxy will be the best barrier to put over the lacquer for two reasons.
First, the solvency in an epoxy is less likely to attack the lacquer and re-flow, melt or just plan attack it.
Second, the epoxy is air tight so it will stop or slow the lacquer from deteriorating as fast.
I would recommend you spray one wet coat of epoxy and walk away for an hour or two before spraying the second coat, this would be overkill but a very good ounce of prevention.

Bottom line life expectancy is????
Who knows, could be 20 years or could be first day in sun after painted and anywhere in between.

Do give your options some serious thinking as it is easier to get the primer off now than after the truck has been all painted up and also consider there is not one benefit I know of by leaving that primer on the truck.
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Old 01-05-2007, 05:11 PM
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thanks for advice

thank you guys for the advice I knew I wouldnt like the answers but thats just me being lazy, I guess you know what Ill be doing this weekend-lots of sanding! thanks again..
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