I remember people experimenting with hull textures / finishes some years ago in racing kayaks.  At one point the regatta lake ended up with a film of oil folloing all the boats!  When waxes and treatments were banned people found a 1200 grit 'satin' finish was best.  It can be achieved with 1200 grit paper or scotchbrite pads.  I guess it works like the sharkskin swim suits.