Flap discs are my favourite angle grinder accessory, don't know how I lived without them previously

If you don't already wear a dust mask when using one, I'd advise on one. Used a flap disc to remove a sizeable amount of aluminium from a pulley once, in the absence of a lathe. Didn't wear a mask and felt quite unwell afterwards. It didn't amount to anything thankfully but I always wear a mask now whenever I'm using the grinder; can't be great inhaling fine metal particles!