I also have a Byron Mig 15 in Krylon Sandable Primer. What are the compatability issues with going over it with PPG? I don't really want to wipe it all off and start from scratch again. Guys thanks for the tips. This is exactly the type of responses I was hoping for. I have since talked to a friend who does auto painting. He recommended using the cheaper stuff like Marhyde for the primer and then using a good name brand like Dupont or an equivalent for the base and colors. Any thoughts on the cheaper stuff.