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I was worried about the possibility of degreasers breaking down the binder, so I went with the boil method.

It barely fit in the one* SS pot I have for boiling random crud in, label up, with the...

Well, when I spotted it, I was instantly reminded of several different makes of lapping stone. So that is my intended use for it. The fact that it is a Norton Abrasives helped ;).

It is porous to...

Not the worst idea. Starting the heat only after the brick is already in would prevent thermal shock, and explosive oil & water mix results. The water would flush some of the oil out... might do it...

I managed to find more info on the griddle brick. It is made from Alundum, which when searched for, Wikipedia redirects you to aluminum oxide. So it's basically a brick of aluminum oxide.

Because...

Yes, the instrument is a "beam compass", with a 72" capacity :D. I grabbed it to aid the wife drawing uniform circles for her geometric patterns on decor.

235118

Got the whole bunch for about ...

Ugh. I typed a description, and the circumstances that lead me to these finds, but there was some sort of low memory error that reloaded the page, minus all of what I put in the body of this post....