For the PIN*BOT, I have mylar on most of the playfield, the playfield does show the start of planking. Will lifting the mylar lift the paint too? Is this a risk I have to take? Cliffy has photos on his page of the restore he did on his. Post your progress on this pin as there are other Pinsiders working on their PIN*BOTS.
This site is important, and is easy to navigate, and has a lot of info on repairs and parts supplies swirling around on it. I can remember trying to repair pins before the internet. There was hardly and parts available too. In the early 80's there were many pins that were tossed out. Operators, and the Distributors told hobbyist that the early SS pins were not worth repairing. The pins at the time were easily replaced why try to fix it.
Don't give up yet.

Are you going to put a piece of mylar on the area were the ball drops from the 2nd level into the right side in lane?