If its out of the water a stiff wire wheel on a drill works good. if
you want to polish it do so with a 200 grit paper. I use a paint
scraper if the props under water they pop off with ease. As far as
antifoulant goes, you can paint your prop when you pull your boat, but
if you use your boat alot, the paint will not last long on the prop.
And on a folding prop it may foul up it's ability to fold. I say dont
bother painting it.

Joe