Abrade

• to scrape or grind away flashing to expose the base glass.
• to grind a rock surface by the friction of rock particles carried by water
• To grind shallow patterns into glass with a wheel.
• wear away
• scour: rub hard or scrub; "scour the counter tops"
• To rub or wear off; to waste or wear away by friction; to damage or make rough; as, to abrade rocks