1) What is the finish on my Black 1970 Camaro Steering Wheel ?

2) Is the Finish a Paint or is the Plastic Black throughout ??

3) What can I do myself to reduce/remove minor scratches ???

It's black plastic the whole way through.. no paint. You can scuff out the scratches and polish the surface back up to a high gloss just like you would a painted surface...using the same basic products you'd use on paint... It just takes patience and time.

That's interesting. I recently picked up an original GM wheel that is black and in good shape aside from some minor scuffing and some flecks of white paint on it. When I tried to remove some of the white paint with some lacquer thinner it seemed to be softening the black surface below it like it was paint.