polish isn't colour dependent.
if you meant a wax, or other coating for your car, then, again the answer is... it isn't colour dependant.
for something that is cheap, easy to use and lasts a long time, I would go for FK1000P.
it can be used on your paint and wheels... and used correctly, is very quick and lasts for ever... (6 months at least, plus the tin is HUGE!!)
as noted above, your 'brand new' car paint will have marks, swirls and contamination on it already.... it's very rare that a new car is a) brand new (think of the journey it takes via road, rail and sea to get to this country) and b) without marks.
if you're new to "detailing" I wouldn't worry about a few swirls here and there... a 100% swirl free daily car is just a pain in the backside to own...