After hours and hours of sanding , grinding and attempting to chemical strip the awful undercoating on my 6....
I found a chemical that works!!
Por-15 Paint stripper. It's advertised as the only chemical to strip por-15.
Guess what? It stripped a fenderwell in about an hour and a half. Versus.... 6-10 hours of grinding, sanding etc...
Spray it on, wait 10-15 minutes, Scratch it with a gasket scraper, spray it again and wait 10 minutes. It comes off like soft bondo.
Have not tried the really heavy coat yet.
Just thought I'd let you know.
And it's only $27 a gallon