We used to use them on vehicles to get the smoke smell out. Two warning we were given multiple times. This applies to industrial strength.
1st. Use in well ventilated area and don't inhale(very dangerous for humans and animals)
2nd. They will dry the rubber moldings in cars out to the point of cracking and I'm sure would do the same for all the rubber in a pinball machine. Part of the test to see if you've done it too long was to leave a rubber band in the car and when It was cracking it was time to get it out of the car...
Been many years, but that's what I can remember.
