Walnut Shell & Organic Finishing Media

Crushed walnut shell is a natural, biodegradable dry polishing media used to clean and polish metal, plastic and wood parts without scratching. Its fibrous structure absorbs oils, greases and polish residue while gently burnishing the surface.

Walnut shell media is widely used for dry polishing jewellery and watch parts, cleaning moulds and dies, deflashing plastics, tumbling brass cartridge cases and restoring soft metals. Because it is dry, no rinsing or drying stage is needed.

We supply graded walnut shell from coarse to fine grit, as well as corn cob media for lighter cleaning and drying duties. Ask for a sample to test the finish on your own parts.

Frequently Asked Questions

What is walnut shell media used for?

Walnut shell media is a soft organic abrasive used for dry tumbling, polishing and surface cleaning. It removes light burrs, flash, scale and soil from delicate parts without damaging them, and it is also widely used to de-flash plastic and to polish jewellery, brass and aluminium components.

Is walnut shell media reusable?

Yes. Walnut shell media is durable and can be reused through many cycles. It breaks down slowly under use, and the fine dust generated is usually screened out. Because it stays soft, it continues to polish gently even after repeated use, which makes it economical for continuous production.

When should I choose walnut shell over corn cob or bamboo media?

Walnut shell is harder and slightly more abrasive than corn cob, so it cuts light burrs and removes soil faster while still being safe for delicate parts. Corn cob is better for very fine dry polishing and drying, while bamboo media is preferred for stronger deburring in dry barrel finishing. The best choice depends on how much edge work the part needs.