[oldandtired]

There is an excellent product named Dolphin Glaze. It comes with a hardener, will fill the cracks with no issues, does not shrink, is easy to sand, feathers well, and will take pretty much any primer or paint. It is made by U-Pol. You can use it on the steering wheel, metal to fill pits prior to priming, plastic, or wood. I have some cans of PC-7 sitting on the shelf never opened because after I bought them a friend with a body shop introduced me to Dolphin Glaze. I suspect PC-7 works just fine as well, but the Dolphin Glaze will set very quickly and is finishable very quickly.