POR-15?

It's awesome. My frame in my profile pics is por-15ed. It's strong as hell but a mess if you get it on your hands or clothing. It takes time to prep the metal properfly for the por-15 but it's definately worth it. I used it on my frame and tried to chip it with a hammer and it wouldn't chip. It's really strong and you dont' have to worry about rust since it chemically deteriorates the rust.

They do make POR 15 with UV protection. I went in to buy some for work for some trailer frames and the lady told me I need the UV since it will be outside. It took a couple of days to get it but the stuff layed out awesome. I also used their thinner to spray and yes, use a piece of c r a p gun or it will ruin it over time. HEre's a link to the particular one I used..

http://www.por15.com/PRODUCTS/PRIMERPAINTSCOATINGS/TOPCOATS/BLACKCOTE/tabid/122/Default.aspx

Radar