Quoted from Oldschool77:

I/we didn’t technically "break" something, but more like screwed something up very badly this past weekend.....I got a Dungeons & Dragons pin a couple weeks ago.....in amazing shape except the previous owner ripped the mylar off and took most of the insert art with it (and left the glue behind). After spending 3 days removing old glue and leveling the inserts, my amazing artist wife spent another two days painstakingly repainting all the inserts from scratch, and they looked perfect!! I then cleared over her work with automotive clear (fast drying touchup, i use it all the time).......let it dry for a few days and then yesterday played about 10 games on the machine. I quickly started to realize that all of her touchups were starting to "disappear". The paint and clear was plenty hard and dry, I’ve used this method for years with no issues.....
Then in bed last night it dawned on me why it was happening.......like an idiot, after i removed all the glue, in my excitement to see how nice i could make the playfield, i waxed the crap outta it with Carnauba BEFORE she did the touch ups. 4 coats!!! So all that hard work is coming right up because it's sitting on a bed of wax. My plan is to just let it get as bad as it is gonna get (i don’t wanna scrape off the "original" artwork trying to remove the fresh stuff that way she still has a go by underneath) and then she's gonna do it again AFTER a wipe down of isopropyl this time! Thank god she loves to do touchups; I still feel horrible though!