i had a really nice big tool and dye shaprening stone... my mother barrowed it for a while and braught it back to me... she used to to sharpen the bures off of peaces of endcaps at her work... this resulted in a large... 1/8 depresion running down the center of the stone. is there anyway to even out the serface again? i'd really hate to throw it out and buying another one is not an option.

Can you flatten it on a diamond stone?

Lap it on a piece of plate glass?

I once had a small sharpening stone (1"x4"x3/8" maybe - nothing special, $10 or less at the sporting goods store) that had some grooves worn in it due to both some misuse and a lot of sharpening of hooks.

I figured if I can smooth the surface and square the edges of a bench grinding wheel with a dressing wheel, I can just put a piece of 400grit oxide sandpaper in an orbital palm sander sand the stone. So I did... turned the sander over, held it in one hand and sanded the stone on it with the other. Don't know if it was the right thing to do or not, but it worked fine for that stone and what I was trying to do.

Unfortunately, for a larger stone, it might be difficult to sand the stone flat and square by hand. You might end up with it out of square and sloping to one side or sides.

Also, have to be careful you don't make the stone too thin.

RE #2

I suppose a lapping block would probably work if you can keep the lapping compound from building up & plugging up the stone.

I suppose you could dry lapp it with some sandpaper that has been spray glued to a inflexible surface.

we have a big glass table that we're about to throw away i guess i can use that for a lapping serface.... good thinking. it's a thick stone.. about 3x4x14 and the rough sides fine... she used the superfine finishing side and it's super soft. i might try like a 1000 grit paper or something. i'll let you know how it works. thanks for the idea

Nyes two cee thatt Huked onn Fonix iz helpeeng wit yur speeling.

Just leave alone, most blades will span over the grove so it should affect it ability to sharpen.

^so youre saying no need to repare?