I looked at the stewmac fret polishers and there are several grits. Which one do you use?
I have the full set and use them all when I level, crown, and polish. If polishing only, the 2000, 4000, and 8000 should be all you'd ever need. As for the guards, they are great, save a lot of time and effort vs. tape, but I found the rubber bands useless - just holding in place is quite sufficient.
Bill, tgo