Ya'know, like a golf ball - Boat Design Forums
"Back in 12 meter days, I believe 3M had a surface treatment that did exactly what you are describing. It worked to some extent so was ruled illegal."
I have no better source now but remember reading about it before from more "reliable" source. In general the problem seems to be that its very hard to know in which area it would help and in which area it would only add skin friction (which is big deal on boats)