Stay with the slick bottom, it doesnt last as long as polymer, but slick-bottom is so much better on the hill, polymer heats up and gets sticky. Polymer is good on carmotor boats with reduction or built drives, but my opinion is to say with slick bottom, try differnt kinds and see which one u like best. No one knows how long slick-bottom will last, it all depends on how much you run the ground. I know of a few people around my area who apply them. if you need there name and numbers just ask.