Diatomaceous earth powder is extremely fine, porous, and hard, which makes it a fantastic abrasive for cleaning and polishing metals, including silver and pewter.
Follow these steps to polish silver or pewter with diatomaceous earth:
Dip a cloth or cotton ball into some DE.
Rub each utensil with the cloth or cotton ball in a circular motion, applying moderate pressure.
Repeat until all surfaces are evenly polished.
Remove any residual diatomaceous earth by gently brushing your silver or pewter with a clean, soft cloth.
Note: Because DE is very abrasive, this method should only be used occasionally to restore your pewter or silver's shine.