Heh heh, memtest86 passed over 115% with no errors. There looks to be a slightly borked trace near one tiny IC, but that looks to have been there before the mishap. I mistook it for being a glue spot and tried to scratch it off, although only a few times fortunately, with a paperclip and toothpick instead of a blade. Nothing really broke, and as they always say: if it ain't broke, don't fix it. Some goop looks to still be leftover under the slots, but the acetone, along with the other solutions I tried, got there nevertheless, so I nulled out any chance of the glue's interference with the electronics-- if any, to begin with.
Literally. I doused this board in multiple mayhems of rubbing alcohol, body shampoo, dish detergent, dish soap, multiple solutions (not even just Goo Gone but also some experimental jank from the local depot) and of course, carefully repeated dabs of nail polish remover. I intensively used the hair dryer to the point where some chips got really hot. I let suds get over everywhere, and I'm not sure if the water I was using was even deionized. Heavy meddling was involved to the brink of possible error.
A check with the reference disk reveals that everything still works. This also means that the factory wire fix on the top right of the board also managed to stay put. Stickers and all are fine. This is the only time where being reckless gets me off free. Do not be inspired by posts like these. I might have possibly reduced the shelf life of the planar along the way, but what matters is that it's not broke.
When it does break, however, I'm going to send it to a repairman who deserves it more than I do, and swap it out for a 486 planar that has been sitting with a colleague of mine.