[69RamAirDave]

Sand it down, dont use a chem stripper. The chem strip can soak into the urethane and cause problems later. You can use a small orbit da for the larger areas, but youre pretty much stuck with doing the corners and edges by hand. Slow process, for sure.

Its usually best to sand all the way down to the urethane. That way you remove any of the old lacquer product that could make its way back to the surface and cause cracking down the road. As for fixing the cracks, 3M makes a good product made just for this.

Never heard of using JB Weld for this before. Does it have enough flex in it?

dave