[...]I'm sure others will chime in and say it wasn't that bad, but for my money, I won't ever do it inside again.
Not this guy - I totally agree with you on this. I polished up a corney keg just for poops and chuckles. Took a couple of hours to finish, at which point I flipped up my face shield and realized I had just thoroughly dusted my workshop with a coating of grey/black flecks that wouldn't come clean with just a shop vac. I ended up have to wiped down every horizontal surface in the shop with dampened rags. Royal pita.
If I ever do that again it'll definitely be outdoors...
Cheers!