Reply To: Diamond Sharpening Plates

A brisk scrub with Barkeepers friend , Bon Ami, or other powdered cleanser will also help clear a clogged plate. Use a proper lapping fluid. Paul recommends Auto Glass cleaner. I find a solution of Simple Green and water also works. You want something with a low surface tension.
If you are into petrochemicals go for just kerosene or something really light. Many spray oils are too viscous.