Thread: Finishing Stone Question

Does anyone see any issues with using a flattening stone on this guy? Seems a bit warped, and there's weird discoloration happening. Stone is completely smooth to the touch.

Hard to say from the pic. Remove it from the box and spray it with oven cleaner to remove the bulk of the crud, scrub with a stiff brush.

A long soak in Simple Green or any good degreaser 50 percent solution will get it clean. May need to soak for days, weeks or months if it is very greasy.

It looks large and possibly an Arkansas stone. If so, only loose Silicon Carbide will get it flat, start with 60 grit. There are many posts on lapping Novaculites.

Some better photos after cleaning may help identifying it.

Originally Posted by Euclid440

Hard to say from the pic. Remove it from the box and spray it with oven cleaner to remove the bulk of the crud, scrub with a stiff brush.

A long soak in Simple Green or any good degreaser 50 percent solution will get it clean. May need to soak for days, weeks or months if it is very greasy.

It looks large and possibly an Arkansas stone. If so, only loose Silicon Carbide will get it flat, start with 60 grit. There are many posts on lapping Novaculites.

Some better photos after cleaning may help identifying it.

I started to use a Norton flattening stone on it - the "crud" part is actually what's underneath. The more I flatten it, the more of the solid gray goes away and the more of that "rusty crud" starts to show. It's all super smooth though. Not greasy at all to the touch.

Originally Posted by Euclid440

Hard to say from the pic. Remove it from the box and spray it with oven cleaner to remove the bulk of the crud, scrub with a stiff brush.

A long soak in Simple Green or any good degreaser 50 percent solution will get it clean. May need to soak for days, weeks or months if it is very greasy.

It looks large and possibly an Arkansas stone. If so, only loose Silicon Carbide will get it flat, start with 60 grit. There are many posts on lapping Novaculites.

Some better photos after cleaning may help identifying it.

I second that, Silicone carbide powder has saved me so much time, just make sure to clean the stone and lapping surface 100 percent before moving on to the next grit, Im sure that would be covered in video.

Using a lapping plate on coties can be done but it will ruin a lapping plate as the cotieis so damned hard. Sounds like the color is coming thru more so a cleaning should be done. Grease and oils get down in the stone and can feel smooth to the touch. It wouldnt hurt to cleaning it.

Looks like a washita

I'd agree with it looking like a Washita. But still needs a good scrubbing, before its definable. If it is, you have a very versatile stone.