Anyone have any ideas? Came in an extremely old paddle. The level of surface mirroring is ridiculous post lap and some burnishing. It is not a trans ark. Pingy, no oil smell at all, white slurry. Strange inclusions that under a loupe seem vaguely crystalline but do no harm.
https://youtu.be/DpxutmNjCmo
https://youtu.be/MSMtuMPiZkI