I think it has a fabulous patina and I would not repaint it. Just make sure all the wood is sealed to keep the fuel and oil out. If the wing bell cranks were done correctly they should work fine with a single servo. But if there is slop that would be a problem.

3M 77 is not very good in the heat so depending on your climate it will come loose. It melts at around 120 degrees but will come loose with repeated exposure to 80 and 90 degree temps. You might see if you could get some high temp contact cement from a shop that does car headliners and brush it under the lose covering. Depending on how much of the coving is loose CA might work. Possibly pull it tight using masking tape and then CA it down.

I’m not sure if the AMA will give out the names of members by AMA number but you could try. It would help if you explained that you have a very old model and would like to contact the owner. The 60XXX number would have been issued in the late 60s.