I have been a bodyman all of my adult life, and now teach the trade. Of all of the epoxy primers I have used, SPI is hands down the best. From adhesion, sandability, work time, etc. SPI is the one to pick. Many, Many pebble beach cars have been done with 100% SPI products.

All this coming from a lifetime DuPont guy, and you know how they are!!!

If you have any questions please ask and I will be happy to answer.