I have seen spray lube in magazines advertised for $10 a can and read about a guy in Trailer boat magazine that sprayed his bunks with a lubricant spray. He now says his bunks are so slick he fears his boat will slide off the trailer as he backs down the ramp as he likes to unhook the boat from the trailer so he can power off the trailer. He didn't mention what kind of spray he used. WD-40? PAM cooking spray??? Has anybody tried anything similar? My boat has a rough bottom paint and unless you deep six the trailer your not sliding this boat back to launch.