Walnut Shells are often used to deflash plastic parts, deburr metal parts, clean molds and polish metal surfaces. Blasting can eliminate hand scraping, brushing or grinding. Comes in a 50lb bag in various grits.
Medium Grit 12-20 Part 4004
Coarse Grit 8-12 Part 4004-1
Fine Grit 20-30 Part 4004-2