Re: Cracks in steering wheel
I used bondo on an old Attwood wheel from the 60's that had some cracks. The best part is that it dries fast and don't shrink. I tried using the POR 15 kit once and it was tough to sand. Bondo is quick and seems to last just fine. A car resto guy turned me onto it years ago.
I painted mine with automotive paint, it was a half white, half metalic blue wheel. If you wrap the bondo with Saran wrap, it will come out smooth an shiny. I cheated and saved myself some sanding by filling in a few cracks and taping over them with packing tape shiny side up. In most cases the joint was perfect the first time. You can also use filler primer to fill minor imperfections too. I used a flex agent in the paint too since I figured it would flex a bit or be expanding and contracting a bit in the sun.
I suppose if you search "Bondo steering wheel repair", you'll find some others using it too.