I refurbished my TR4 steering wheel. The weld broke attaching the spokes to the steel rim. I cut enough of the plastic away to weld it, of course the heat melted some more of it. Repaired it with POR 15 epoxy putty. It isn't perfect, but then neither is the rest of the car. I painted the wheel using gloss black enamel with a catalyst. I don't know if the gloss was appropriate, thinking of scuffing the paint and redoing in a satin. What are your thoughts?