Poor man's hardware store version of PCB snot?

[M0BSW]

 Now I can help with this one , I have here some really old 1940's wirelesses, with candle wax on the coils & trimmers,and when I set up a trimpot on one of my CW transmitters I used some of my wife's nail varnish, red is the best as you can see where you've been,best not to tell the wife though . 

[vk6zgo]

If you weren't so miserly,you would  keep her current one,buy her a replacement bottle & a spare for your work.
Of course,she will then know that you're using it!

[notsob]

One place I worked at had a few pot twidlers, instead of analysing a fault, they would play with the pots first. Really annoying when one got called to a site after them to find machines having errors due to miss alignment. So I had a collection of different colours of nail varnish of really weird colours that I used to 'lock' the pots. So I could catch the 'bastards' out.