We won't let RCKen mislead you. You can assume he is spot on with every post.

Wood props can be a misery. I would recommend APC Nylon. I also lightly sand the sharp edges, leading and trailing edge, and balance all of mine. If you need to adjust them scrap the front with an X-Acto blade held perpendicular to the surface (like a cabinet scraper). It usually only takes a teeny amount. The problem with paint is that it always flakes off, and usually does so unevenly. Or, as RCKen said, don't worry about it. APC has very good Q.C.