by Matthew
I use any Flat paints. I've had the same problem with Krylon before. Sometimes it does it, and sometimes it doesn't. It really seems that it is the conditions that cause it to not stick. Temperature and part prepping seem to be my main problems. If I screw up a part, I will strip the paint then will wash the parts in soapy water, then run the spray paint can under hot water, then make sure to shake it a minimum of two minutes. Usually the second go around with the same paint and parts will work. Not sure why it is so finicky.
Anyway, here is a list of ones that I regularly use
Krylon Camo Ultra flat paints (black, od, tan, brown)
Krylon Primer White & Gray
Cheap-o Walmart Primer Gray
Cheap-o Walmart Primer Red
Rustoleum Primer Charcoal Gray
Rustoleum Primer Brown
But, like I said, I've had the best results with flat spray paints. Krylon typically is my favorite, because of dry time. Usually the cheap-o Walmart brands can take a long time to fully dry, especially when it is cold outside.
BadAsh also filled me in that you can apply a Matte Clear Coat over glossy spray paints and it will dull them down. Really expands spray paint color choice for base coats.