I'm doing the 50/50 Diesel/used oil mix. It's a trailer, not a show car. Got the first coat on before screwing the boards down, and will be putting a second coat on after I get it finished. Probably be slicker than greased monkey snot on a boiled egg when it's wet, but I'm not typically using an open trailer when it's raining, either. Rain means too wet to tractor and too wet to build. Snowing means the global warming theorists were LYING in Alabama. Now that I've put that in print, I'll probably get arrested because a greenie will call the EPA on me. If you only knew my luck......