I have put "slicks" onto several of my C Dory's trailers, but not entire length. The slicks are usually of High-Density Polyethylene (HDPE), Polyvinyl Chloride (PVC), Polypropylene or Acrylonitrile Butadiene Styrene (ABS)
As noted, they are very slick, and do not detatch the boat until it is...