I'm looking for some kind of paint that I can use on my wood ramps for sliding the big outfitted raft onto a trailer. The wooden ramps have raised wood runners on both sides of each ramp - so that gives me Four 1 inch surfaces to slide the raft. I've got them sanded smooth with rounded corners and now am looking for a "slick" paint to help with the sliding. Any suggestions on a suitable slick paint just for the top of the runners? Many thanks.