[morzh]

Arran

yes, led, cadmium plating...when you disassemble an electrolytic cap, there are nice things inside too. Gosh knows what in that electrolyte, which it has at least 1/2oz, one could here it splash.
Tar. Dust of unknown origin. Dead mice.

I simply made it a habit to 1. Not to ingest or drink anything, while in the workshop, along with not touching my nose, mouth and not wiping hands with my T-shirts. 2. After the shop, I will clean hands from un-washable substances with Goop or mineral spirits, 3. Then I will go upstairs and really well wash my hands with soap, so no visible traces of anything be left on my hands, and, in case of handling something that used to have contact with mouse excrements, use IPA on my hands. 4. And, if seeing things like cadmium plating, that turned into that yellow stuff that is no longer bound to the plated surface, wear gloves and wipe it off with some solvent before going any futher, if possible.

It is, despite of how it sounds, not too bad and difficult: one just has to remember, that he is dealing with old, very old technology, when the safety standards were very different, and that was kept in not well-controlled environment. And then use common sense.