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Old 04-27-2009, 05:26 PM
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Which primer for spot repairs? Etching versus ?

I've read tons of posts - I'm on page 24 of this body group alone. Tons of great info! Here's the question: I'm in the middle of a 65 Mustang restore (mine) with a 69 Chevelle (customer's) I may be shooting as well. I own a car repair biz, but haven't shot paint in 20 years. I've been reading up on primer usage and understand how etching is preferred for bare metal and rust protection but shouldn't be used over old paint. So, what should be used for spots of rust which are sandblasted clear next to old paint? Would epoxy be a better deal here since blasting has already etched the metal? Would etch primer be better with very little overlap of old paint? Am I worried too much??

I spent half a day stripping the hood and have no intentions of stripping the whole car! Aircraft stripper just won't cut whatever primer is on this thing so I've been busy with a 4 inch grinder with 60 grit disks. No fun! Anything better should I wake up in a better mood and want to strip it?

For a reference, it looks like I'll be using Nason products due to local availability.

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Old 04-29-2009, 10:52 AM
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Both will work just fine.
(There's arguement over this that will never be settled.)
Epoxy is better, but slower, and you don't need etch at all with it..
I never use etch, but it's used all the time in body shops
because of ease and being quick.
Don't use epoxy over something that's been soda blasted-that's a no-no.

Either way, when used properly, it'll last longer than the car.
a little etch on existing paint shouldn't be a concerne.
But I believe epoxy does better and offers more protection
so it's all I use.
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