Yea I have gone through a gallon of high build already!
So this stuff is different than SPI high build? It goes on thicker?I like Evercoat Featherfill G2 polyester primer. Some prefer Slicksand but basically it is spray on body filler and chemically sets up in about 20 minutes.
Trick is to get it out of your gun before it kicks.
It's a similar kind of stress as trying to spread a large skim coat of poly putty on a hot day, only the poly primer gives you a nice even coat all over the panel. The drawback, which is also the drawback to any thick/multiple primer applications, is that you have to really pay attention to getting it off of panel edges, trim holes and key holes, and other places where excessive build will cause problems. Just like a coat of filler, most of the poly primer should end up on the floor when you're done sanding, only staying in the low areas. I think a lot of vehicles are done with over-applied primer that hasn't been blocked enough to fully utilize it effectively and minimize film build.Um that sounds stressful.......