Looking for advice with the refurnishing of the formula and trans am steering wheels used from 1970-81. The rim is foam and deteriorates over time. I have used flexible bumper repair material to replace chunks which may be missing and large cracks. I coated the last wheel with spi black epoxy and it looked great. Just saw the car a couple years after doing it and it had cracks all over where the owner had been grabbing it. Any ideas as to what I can try next?