A recent troll through the forum posts brought up the issue of grinding/polishing paste. One product that might be considered is Jeweller's rouge which is available in many grades and importantly in small quantities. Hope this kernel of info is of help.
Back in the 90's I used jeweller's rouge on a softwood mandrel to finish the bore on my first steam engine, a Reeves Trojan. That engine ran fine on very few PSI, and still does 25 years later
Useful stuff. Used it to remove glue residue from new double glazing units, that no solvent I had, or the installer had, would touch. I wondered, if something in the adhesive on the stickers had eaten into the glass.?
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