Applied to my 5 x 8 steel trailer bed
The bed and sides were rusted pretty badly. I scraped and sanded to prepare. Lots of hard work but well worth the effort. I then applied two coats of Gempeler‘s rust prevention product. My van apply two coats of the black smooth Durabak to the bed. Came out looking really good. It has not stood the test of time yet but I have no reason to believe that it won’t be great for years to come!