Filing School

If you have used cutting oil, a solvent like paint thinner will work, less chance of corrosion.

The carpenters here used dilute hydrochloric acid to refresh their files, washed off ith water.
Be careful about residue causing corrosion, best to use alkali later to neutralize the acid.
 
Found them, needle files etc. from my apprenticeship days....
files.jpg
 
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Reactions: anatech
I thought about going to Filing School, but before I could go some Bastard stuck his Hand in the matter and gave me a Rough time. I tried to Smooth things out and hoped to Round up the necessary support to Square them away. However, my efforts ending up coming out rather Flat and I wanted to stop the downward Spiral before it got out of control. I just didn’t want to Rasp anyone’s nerves over it.