Originally Posted by
Euclid440
Yup, Silicone Oxide loose grit from GotGrit.com. 60 grit will get you to flat on a steel cookie sheet, (Dollar Store) and flat cement floor. The sheet will contain the mess and it is messy and the steel sheet will give you a reasonably flat surface on a hard floor. A 60-500 grit assortment will cost you about $15, then switch to Wet & Dry to finish.
Start with a tablespoon of grit and enough water to make a paste, mark a grid with a sharpie, pencil will just wash off and use your body weight, add more grit a tablespoon at a time and remark your stone as needed.
You may want to wash you stones first, with oven cleaner and soak with Simple Green and water, heat will speed up,(Thrift Store slow-cooker), the process, but may still take some time, weeks or months to completely remove the oil.
Once flat you can move up grits fairly quickly, finishing on 1&2k Wet & Dry.
You will get a work out, but it is not that bad, Wet & Dry or a diamond plate will not make a dent, and you will burn through W&D and can ruin a diamond plate.
Once flat and polished & burnished it will provide a very nice keen edge after a good clean 12k edge, it is a unique edge and worth the price of admission.