I would say to use a name that most people (our age) would remember.... that fits the personality you want the car to have... and a solid color, since most guys then didn't use metallics for race cars.

If "Mellow Yellow" works for you, then it would probably seem right to others. I have this theory about paint schemes... If too many people don't "get it" then it was probably not a great idea.

I think the Heinz idea is really cute... and the "ketchup" referrence... but you have to remember the slogan about "57 varieties". I don't think I've heard that spoken in decades. (...but it IS funny!) :-)~