Sounds like a good way to test it and any other stones you pick up, let us know (hopefully post some pics) the results.
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WOW, I think your right, I googled it and found several that looked almost identical (but better shape) odd thing is, when I put water on it with my water spray bottle it doesn't bead up. I will have to weigh my options on if I want to just start using oil, or perform a deep clean on it.
Thanks
Somebody before you could degrease it on the top and what you see is crud insight of the hone. Washita is quite porous stone.
Bite the bullet and go onto E-Bay and buy a Swaty hone for about $22 American, save a lot of work and you know when you put a STr8 on it is won't ruin any metal. IMHO, thanks for readin'!!
tinkersd of SRP