The Edge Pro aluminium oxide powder can be used to lap and clean the Edge Pro Sharpening system sharpening stones. They are suited for stones with grain sizes up to 240.
You use the powder in combination with water and, for instance, a lapping stone or a glass surface plate. You evenly divide the mixture of water and aluminium oxide powder over the stone or glass sheet. When you use a lapping stone you move the worn out sharpening stone over it in diagonal movements. If you choose a glass sheet you need to make circular movements.
If need be you need to add additional water and powder during use. After a while your stone will be as new again. Great because it means your knives will also become razor-sharp again!