Bare Conductor/ Electric Paint really worked on an older Radio Shack Pro Bridge I received as a gift back in the 1980's. The push down keys was no longer working.
Amazon has the Electric Paint so I scissor trimmed a small paint brush and coated the rubber disks above the printed circuit board. The conductive paint put me back to game on.
In Simulator, top view of printed circuit board switch. The rubber disk and push down key are above and rubber disk has coating to make electrical connection.
This video shows how repairs can be done.
How To Repair a Remote Control
https://youtu.be/MwvcJlJ8mEI
