I like Mike's idea for using Bondo. It is about the same density of the original steering wheel, has great adhesive characteristics on clean surfaces, and has some flex to it. The problem that I have had with J B weld is that it is extremely hard, making feathering it in with the steering wheel difficult and it cracked soon after a few musclebound turns of the wheel.
I'll be giving Bondo a go on the next one I do.
I didn't like the idea of a very hard product like JB weld or bondo serving as the filler in the cracks/gaps when I did mine.
I reasoned the vibration and flex would just repeat where the rigid meets the flexible.
I used 3M panel adhesive instead.
It is much closer to the rubberized material I found while opening up the cracks on mine.
It sands much more like the original material.
