Hello, I hope you guys can give me some advice here. I have a warmoth body that I grain filled and primed. I am using montana spraypaint and after I gave it a few coats it turned into a powdery substance and i could brush the paint of with my finger. when I tried to sand it it turned into a red color and the paint is brown(latte). At first I thought it was just a bad can until I got the same results from another can. Thanks for the help.