Originally Posted by
Euclid440
Simple Green and water soak will remove any oil on a Coticule and not damage the stone, except a glued stone. A glued stone may come apart, but can be re-glued.
I think it’s the water more than the Simple Green that makes them come apart, probably a water based glue, I think some old ones used hide glue.
Smith’s is the best alternative as stated, 2-3 drops on a wet stone is all you need. Other than obsession or a challenge, there are better/easier choices for a finishing stone, especially with a novice honer.