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-   -   Epoxy over lacquer primer? (http://www.hotrodders.com/forum/epoxy-over-lacquer-primer-224316.html)

chipflyer 09-23-2012 07:54 PM

Epoxy over lacquer primer?
 
I bought a 36 Chevy a couple years ago and the body was in red oxide primer which I think is lacquer, based on the fact that I can rub it with a thinner soaked cloth and it turns red. There was a lot of body work already finished on the car and I would say it was very well done and seems to be very straight. I am rodding the car and after finishing the chassis work I have now turned my attention to the body, there are a few areas with minor damage that I will fix and I have actually shaved the hinges and door handles. My thought was that I would just block down the primer and then use SPI epoxy to seal everything? I know many will say take it down to bare metal but I really don't want to remove all of someones great work. Can I get away with this?

Larry123 09-23-2012 10:33 PM

I did this on my mustang about 20 years ago;stripped the paint, did the body work and loaded up with lacquer primer. Blocked it out and used epoxy reduced as a sealer before shooting the base/clear coat. Itís held up well, still looks pretty good. If yours has been in lacquer primer for a couple of years it could very well have some rust growing under the primer, epoxy wont stop this if its started. You would need to do over if thatís the case.

deadbodyman 09-24-2012 06:23 AM

I'd try sanding the red primer off, being very carful not to sand any filler when you come across it...

swvalcon 09-24-2012 06:31 AM

was the car stored inside or did it get out in the weather? If it sat in a garage the whole time I would use a straight board or air file with 180 on it and take it down untill I started to see small spots of bare metal and filler. Then if I couldn't see any surface rust I would just put a coat of epoxy on it.

chipflyer 09-24-2012 07:07 AM

It has been stored out of the weather the whole time. I think I like the idea of taking it down to filler, I do know that it would be best to remove it all down to bare metal but there is grey epoxy under the primer (no idea what kind) that seems to be stuck to the metal pretty good and somebody did a lot of nice filler work, so I don't want to jack that up. Would it be Ok to use a DA with 80 grit on the more flat areas? Most of the car has big ol' curves and won't be fun to block! I have read lots of good info about SPI epoxy and think that's what I want to use to seal, is this a good application for that product?
Thank you

Jeff

BarryK 09-24-2012 07:56 AM

Quote:

Originally Posted by chipflyer (Post 1593430)
It has been stored out of the weather the whole time. I think I like the idea of taking it down to filler, I do know that it would be best to remove it all down to bare metal but there is grey epoxy under the primer (no idea what kind) that seems to be stuck to the metal pretty good and somebody did a lot of nice filler work, so I don't want to jack that up. Would it be Ok to use a DA with 80 grit on the more flat areas? Most of the car has big ol' curves and won't be fun to block! I have read lots of good info about SPI epoxy and think that's what I want to use to seal, is this a good application for that product?
Thank you

Jeff

DA a spot as if it has been outside and there is no epoxy under the lacquer primer or old paint you will find there is rust on the metal.

deadbodyman 09-25-2012 05:27 AM

It may even wash off fairly ez with lacquer thinner and if that is epoxy underneath the thinner wont hurt it at all.just be sure to give it a thurough cleaning with W&G before spraying anything on it ,there could be a residue left.

chipflyer 09-25-2012 08:54 PM

Quote:

DA a spot as if it has been outside and there is no epoxy under the lacquer primer or old paint you will find there is rust on the metal.
Followed Barrys advice and found surface rust on the right rear fender under the primer/bondo and no epoxy. :pain: Used a striping disk on that fender and have it down to bare metal now. Took off the primer and layers of bondo and have some metal work to do before epoxy.
Guess I'm not as far along on this thing as I thought I was.
Thanks for all the advice everyone.

Jeff

Larry123 09-25-2012 09:52 PM

Itís a lot of work to do over, but you will never regret doing it the right way!


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