Called my home depot and they DO have this glidden alkyd gloss in gallons and quarts, tintable. But it also says on the website that the color may yellow if not exposed to sunlight.

And I found this online, where a guy painted his interior cabinets with the same stuff, and in 6 months it yellowed. I think this stuff is not a good idea for a garaged car! Back to rustoleum..

http://www.diybanter.com/showthread.php?t=62871