I'm thinking of trying to desolve what little remains of the polyurethane coating on an old tent and then salvaging the rip stop for a tarp or maybe hammock cover. If I get off all the old, flakey, yellowed urethane coating, can I just brush on a coat or two of polyurethane from Home Depot?

I was trying to get an answr to this by a google serch and I came across a commercial coating company that said they use two products. One for "smoth surfaces" like wood and nylon, and another for textured surfaces. That leads me to believe that the polyurethane for smooth wood from home depot would work on ripstop nylon as well.