This is a professional "Green-Rough" K-1 polishing/buffing compound used for polishing a blade after rust removal or other polishing tasks. You can use this green compound with cloth, felt or on a buffing machine after the use of a rust eraser to polish the mat surface of the blade. It was designed to work perfect for steel and this 500gr (!) bar will last for a very long time even if used with a buffer! (can be supplied in smaller cut sizes  - contact us for details). Features: - For use in: Steel and other metals - Weight: 500gr (please ask us if you need a smaller size) - Chromium Oxide Koyo-Sha brand The koyo-sha brand is well known for manufacturing polishing compounds for professionals and blacksmiths but, in the recent years have developed also products for the home user.