Clear coat the sides and face?

 

So he can have more coating to mess up?

 

I have seen sockets with a plastic insert. The reviews were not good. They stated that they are so large on the outside, that they don't fit many wheels (they are a 22mm socket with a 19mm insert). The reviewers also claimed that the insert would constantly slide out or crack.

 

I wonder if you could just coat the inside faces of the socket with like a piece of electrical tape on each face, or something similar. Maybe buy the next size up socket and line the inside of it with something soft.

 

That would probally be the best if do-able