Old hard drives are my favourite source of super-powered fridge magnets. I have a bunch of them holding up countless childrens' drawings. But the magnets themselves are stuck to base plates of various shapes, some with pins and protrusions which are sometimes unhelpful.
I am wondering what the best process would be to remove the magnets from those plates? They're definitely not stuck on solely by their own magnetism, so my best guess is "some sort of glue". I don't want to take a saw or screwdriver to them, because they're probably way too firmly stuck and also too brittle -- I'd just break them (possibly spectacularly so). I have tried sawing off the odd parts of one base plate, but getting the metal particle sawdust away from (or off of) the magnet is quite a challenge. I have also tried to twist and pry those pins off, but they're stuck in their holes better than my measly DIY-ers toolbox can undo (I don't have access to a metalworking shop).
So ... Heat? Acid? Magic? Some other SE stack?