Never tried "over the counter" paints, but pre-thinned paints (like what you can get from Scale Finishes) seem to work in this brush with no problem. Nice looking Camaro!
I have templates for most US and several Euro- and Asia-spec plates saved in Illustrator that I use for my own builds. Feel free to send me an e-mail with what you want and I can send you a PDF with the finished plates.
Excellent work on this! Same here...I'm even thinking about how cool it could be to open the hood and scratchbuild some sort of steampunk engine. But if I ever needed to liquidate, it would be a good one to still have MIB.