I got a new bottom job with white Teflon and was told that it would be easy to clean. Turned out that it was a real job keeping the waterline clean. I got the Hammerhead brush and using only lake water can easily scrub the junk that accumulates along the waterline. The brush is just the right size and stiffness to get the job done. It seems a little stiff for the hardtop and hull but also works well on non-skid.