Try the urethane based paint from Kirker Auto refinish, I was told
they make paint for PPG among others,
They are a actual paint manufacturer.
Their web site is http://www.kirkerautomotive.com/
Also they respond fast to e-mail questions and you can purchase their products from http://www.smartshoppersinc.com/
I like the service I got from smartshoppersinc, very fair prices.
I purchesed my HVLP guns from these people, fast shipping etc and have
had zero problems with any products purchased from them.
Thanks .... X