Southern Polyurethanes. Any one use them?

An update on the SPI epoxy primer. I have used it on some of my car engine bay and also on a hand truck dolley. This stuff is like concrete. I wanted to sand blast some back off on my engine bay to do some body work and it is like well, epoxy. The paint and rust adjacent to my primer was coming off quickly, and the epoxy was latched on indestructible big time. Excellent adhesion to sand blasted metal.

I have now used their normal 2k surfacer primer as well. Easy to sand and excellent fill. I usually let it sit a day before sanding to allow it to lock up completely.

Will post pics here soon. :)