it’s not surprising that sandpaper comes in multiple forms. Variations include: Abrasive material used; Type of backing; Format (sheet, belt or disk) for specific sanding machines. Grit is one ...

The problem is, there is no data sheet. Wanting to use this ... Then, it’s off to sanding with 200 and 600 grit wet sandpaper. Slowly, the soldermask is removed and the top copper layer appears.