20 Jun
2005
20 Jun
'05
9:23 p.m.
most old puter plastic goes through this
metamorphosis. I had several old monitors that I
scrubbed with a scratchy pad and scouring powder I
think...but it all came back! I'm going to try soaking
the (Lisa) case parts in bleachy water and see what
happens. On second thought...mayhaps I'll practice on
something less, umm, valuable? I don't want to have to
live with it...it looks o so skanky.
--- Tony Duell <ard at p850ug1.demon.co.uk> wrote:
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I would imagine this question has been asked
hundreds
of times, but what to do about it? Im guessing
soaking
it in bleachy water (50/50?). What say you?
It depends on what's casued it. If it's dirt/smoke
residue/whatever on
the surface, then I would start with one of the
anti-static foam cleaners
(both Electrolube and Servisol do good ones). If
that doesn't help, I'd
try propan-2-ol (I haev found some marks that will
come off with that and
not with the foam cleaner).
I've never found either of thos products to have an
adverse effect on
casings, keytops, etc. You do want to take care if
there are stuck-on
labels (particularly paper ones) that you want to
preserve.
More often, though, particularly with DEC hardware,
the yellowing is due
to a chemical change of the plastic. VT100s are well
known for this.
AFAIK it can't be reversed. Maybe sanding off the
surface would do
something, but it would also ruin any texturing of
the surface too (and
therefore it's a bad idea!). Painting over it might
help, it might also
make it look a lot worse. I'd just live with it, I
think.
-tony