Steering Wheel Repair - What epoxy???

That's the same one I'm working on - 66 Dart. Mine's nowhere near as bad as the one your started with. Very impressive!
if I was (well I am) going to do another one I'll make a Dremmel jig with a sanding drum on it to do the finger grips. that way I can just put the steering wheel flat just like you see it on the car and position it so that all I have to do is slide it forwards and the sanding drum does the work. slide back, rotate it a bit and forwards again. Since doing the finger grips was the worst part of fixing the steering wheel. doing it by hand SUCKS!