A good watch cleaning machine will clean all parts of the watch including pivots and the holes in which they fit. If a pivot is worn the wheel should be replaced, if a replacement can’t be found, then the pivot should be repaired, ending with burnishing.
Agreed, if you put any form of abrasive anywhere, then you need to give the part a good clean afterwards, otherwise you are almost certainly going to increase wear on the part or whatever it mates with, due to any fine particles of abrasive that remain.
Cousins do the pin polishing sticks...
.. as no doubt do a lot of jewelry supply companies, and of course ebay...
Yes Valve and tube are the same thing, I still find it amazing that we can all be talking the same language and sometimes still not know what each other means. due to georgraphic variations of some words.
The one that creates the greatest confusion between Australia and the UK is the little rubber 'shoe' you put on your feet.
In the USA I think you call it a 'flip flop' in the NZ they are called Jandles (No idea why), in Australia we call them 'thongs' which I know in the UK and I think the USA is skimpy bathers which in AUstralia are called G-strings.
You can imagine the looks I got when I first went to the UK and told people that in the summer in Australia it was generally too hot to wear shoes and so I would usually just wear my 'thongs'
Some of the low cost meters do have frequency ranges, and since a quartz watch typically operates at a relatively low frequency, they should be able to measure the crystal fairly accurately. Some may even do a reasonable job of measuring 1Hz. I'll have a play with mine and see what I come up with.
Even the really cheap ones, particularly if they are based on the DTM0660 chip-set are often capable of true RMS and frequency measurement.
I have a really cheap Victor VC 921, that I (as my alter ego "itsthatidiotagain") hacked about a while back. https://www.eevblog.com/forum/testgear/hacking-the-victor-vc-921/
There are also some of the Aneng models that might fit the bill.
I wouldn't trust any of the cheap'n cheerful Chinese low cost meters near "real" electricity, as their CAT ratings are usually unverified, and wildly exaggerated, but for this kind of work, they are probably fine.