Then, it’s off to sanding with 200 and 600 grit wet sandpaper. Slowly, the soldermask is removed and the top copper layer appears. After that, it’s just a matter of sanding and scanning ...

Grit numbers range from 24 (extra-coarse) all the way up to over 1000—though most home improvement projects use sandpaper in a much smaller range, from roughly 60- to 360-grit. It's a common ...

Comprehensive 150 Pcs Sanding Discs Kit--This 150pcs set includes 150pieces 3 inch sanding discs sandpaper in grit 60 120 180 240 320 400 600 800 1000 1500 2000 3000 5000 7000 10000 (10 pieces ...