@tubetime oh wow I haven’t heard of a contact burnished (vs high-grit sandpaper). I looked up a little info on them and sounds like it’s the same idea as sandpaper though? You can still scrape through plating past the oxidation?
What am I missing, is the burnished just a lot more gentle than even 2000 or 4000-grit sandpaper? So maybe you could damage plating but unlikely?
Or a totally different sense of all this?
@zackstern yes sandpaper tends to remove too much, too quickly. i guess you could use a fine grit, but a burnisher is easier to manipulate between the contacts.