MicrobeHunter.com Microscopy Forum

I'm in the process of restoring two vintage microscopes to their original cosmetic condition. What's the best way to clean aluminum surfaces that have turned dull and and have small grey spots? I assume I don't want to use any kind of abrasive cleaner on these surfaces (slide holder and graduated scales for a mechanical stage).

Do you mean aluminum as in focusing knobs, etc.?

apochronaut wrote:Do you mean aluminum as in focusing knobs, etc.?

Yes, the focusing knobs and also the slide holder and the graduated scales of the mechanical stage.

Focusing knobs on used instruments usually have a nice fulminating stew of Homo Sapiens detritus in the knurlings. The aluminum is nicely oxidized, so you don't want to dig to deep into that but a discarded toothbrush and some isopropyl, usually can get most of the goober out of those deep dark grooves. Sometimes they need to soak a bit because older, vintage portions of the melange can be well aged but with a little knuckle grease exerted in the right place, you will have them bright and shiny and ready to receive the next batch.