I did my first grind today, i tried to do a fairly light one so it didn't eat my CRM's to much.
I took the wheel out, took the tyre off, and knelt on the rim. I held the grinder at a fairly shallow angle, and ground away (i was wearing safety goggles and earmuffs, just to be on the safe side :rolleyes: ).
It was suprisingly easy, and took around 5 minutes to do both sides of the rim.
I thought it was fairly rough, although i hardly put any pressure on the grinder at all.
However, i was disappointed at it's performance - it locked fine in a forwards direction, but slipped very badly backwards. I tried applying a small amount of tar, but it still didn't work very well.
I sanded it off and applied muc-off, now it's back to it's former self.