My floor in the K5 is almost ready for paint. I was wondering if any of you have used the ruber undercoating stuff in the 1 gallon cans from Lowes,also seen it @ Home Depot. It runs around $36 a gallon,so I would have to apply it with a roller. Has anyone used this or anything similar? I would love to use the rust bullet stuff that can man used,but I really don't want to shell out $120 for a gal. just to use on the inside. I'm not installing carpet,so I need some sort of grip for my feet also. What have some of you done. I searched,but really didn't find the answers I was looking for.