HP-65 1508A04995 restoration and ideas to share

[Mike S]

Appreciated your helpful reply on cosmetic repairs to calculators.

I note you mentioned using sandpaper possibly dampened. I often use what I term, 'wet and dry' paper (on the back it says 'waterproof silicon carbide abrasive paper').
This lasts much better after wetting than sandpaper.
600 paper seems pretty rough to use on a calculator's plastic window.
You'd need pretty deep scratches to justify that I'd have thought.

I will (very gently) try your idea of using a silver/metal polish on the screen of my 49g+.
I read someone's observation that the 49g+ screen could be scratched just by looking at it!
Mine has fine scratches on its inside surface that I think were worsened when I used a watery toothpaste to treat it.
Newer calculator screens are surely not as tough as the classics'.