Progress sofar:
Changed all old bulbs to 47s (roughly 120 globes). Touched up blemishes on cabinet. Cleaned inside cabinet and under playfield, coin door and mechanism.
Plugged in to see what happens after 30 years in storage. The GIs are all OK so the power appears to be OK. The MPU won't boot up and the 2 red LEDs are both constantly on without any blink so I suspect that the flipper ROM is cactus (on closer inspection I found 2 bad pins). I ordeed a new ROM from Ray Johnson in USA and hope that fill fix the issue.
The following photo shows the warm glow of the playfield GIs.