There are JAVs where girls don't wear makeup and they are even advertised as such as main theme.
And I have to agree, heavy makeup is very distracting for bukkake movies. That's the reason I generally avoid Dream Shower even though bukkake is my fave genre.
But even speaking generally, makeup should highlight or accentuate the girl's natural beauty, not cover their beauty.
As a disclaimer, I have to add also, I am allergic to cosmetic products so maybe I am a little biased on this subject.