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Here is a good old post from SRP on Kramer Pigments on Chrome and Iron Oxide. (Iron Oxide Powder?)

There are other older post on SRP listing part numbers for various pigments and discussion on...

The Formax is not pure Chromium Oxide, it is Aluminum Oxide/ Chromium Oxide blend. It is much too harsh for a razor edge. See product details.

Most of the green polishing compounds are not...

100 grams of 100% pure Chrome Oxide, almost ¼ pound is $10 from Kramer Pigments. 10 lifetimes supply.

(Chrome Oxide Green, Order number: 44200)