I just roll barrier coat and bottom paint. I used to not care about that 100th of a knot,
"( but now I understand that an unsmooth surface could be faster (like shark skin)

. )"
Hi Merlinuxo,
( like shark skin ), I don't understand unless there is a reliable research report on this.

The shark has a lot more power to get through the water, he's not concerned about " his unsmooth skin"

! Personally I like a smooth bottom

:naughty: . If my O'day 22 goes thru the water at 6 or 7 mph I'll be :dance:

with a smoothie ....
David S