I use any high quality clear to spray the back of the light blade, I do not like painting the tips or sanding any away on my props, but I also use much bigger props than most, I think my smallest motor swings a 22 x 10 and my biggest I run a 34 x 12 on. On the giant carbon props I put a piece of Velcro (fuzzy side ) on the prop hub of the light side and drop ca on it till it balances, then the big 6in spinner covers it up.