The Home Machinist!

the texture is wrong Quality(Norton etc.) made from 37C looks as You described, but no-name chicom cheapies from 98C are like this: https://sandsklep.pl/userdata/public/gfx/14974/baa14eb84a57b5c21b4891bce86c.jpg Huge pores(think of pumice or coke) appear after first use. That shiny, tar-coated look...

Like Bruce already said, items in last picture are wheel dressers(we call it „coke” here).

Miniatures are still working:





but You need to open them in new window...

Are those photos above lost forever?

Advocatus diaboli here - I really wouldn't mind Rusnok on my workbench

Simple guilloche engraver(rose engine)?

Fresh and concentrated(at least10%) coolant, apply with a paintbrush, wait for few minutes and then wipe it.

Almost sixty ears old - but more actual than ever: S. Lem " The Washing Machine Tragedy "(first half only - you can find rest of it online) Shortly after my return from the Eleventh Voyage, the papers began to devote increasing space to the competition between two large washing-machine man...

Wishing you a fast recovery!