Epoxy Primer after 7 days

Gilles

New Member
I've been using SPI epoxy primer for several years now with great results. Been working on a restoration project for many years and recently stumble on a post in this forum that stated I should DA sand with 180 and re-spray before applying any kind of filler and 2K primer if its benn more than 7 days. I've only been scuffing it with maroon scotchbrite and then putting on filler and 2K primer after that, months after applying epoxy primer. So far no problem with adhesion. That said, I am somewhat concerned that I may have problems down the road. Should I be going back to bare metal or will it be ok the way it is ?

Gilles...
 

Chris_Hamilton

Trying to be the best me, I can be
Sounds like some of it was done at least a month after application. Hard to tell how good adhesion is just sitting there as well. You could try a scratch test of sorts. First simple, simple test is go to an edge where the filler is feathered into the epoxy. Using your fingernail try and scratch the filler away from the epoxy. If it lifts off, that is not good. Also try using a razor blade and do the same thing. Use the blade to scratch it (shave it) away from the epoxy. Success would be it being very difficult to remove, or scratching results in both it and the epoxy being removed from the surface. If it comes off and the epoxy stays consider that failure and would probably be a good idea to re-do those areas if you are concerned about longevity etc.
 

Gilles

New Member
Thanks for replying guys. I will give the scratch test a try. I only work on this weekends so the 7 day rule is a bit hard to conform to in my case.
 
Top