[ARC5] Surface corrosion or pitting on aluminium chassis.

[Leslie Smith]

Hello List-members,

Recently Brian Clarke sold me a BC-453 intended for scrap.  It's not a
complete wreck; certainly the valves are missing along with the case and
bottom cover-plate, but the worst aspect of the set is surface corrosion
on the aluminium chassis. (Hey!  no American spelling here in Oz!)  

I think this set may have the experience of Lazarus, if some-one can
tell me how to deal with the corrosion on the chassis.  The degree of
corrosion:  moderate mottled spotting.  In the past I've had sets with
the most superficial marking on the chassis.  I removed this with a
cotton bud and careful rubbing.  The result wasn't as good as hoped -
rubbing the aluminium polishes the chassis to give an uneven appearance
to the finished chassis.  Not ideal, but it leaves the chassis corrosion
free.

Recently this list has seen a good discussion of methods to restore or
re-stuff the flower-pot caps.  I don't intend to do that with this set -
it's not good enough to warrant that level of restoration.  I'll
photograph the set, remove the flower-pot caps and wire in disc ceramic
caps.  When (and if) the set works I'll re-photograph the result and
(perhaps) post the before and after photos on the Yahoo group site
"www.groups.yahoo.com" and ARC-5radio.

Thanks (in anticipation) for info on how to de-mottle an aluminium
chassis.

Les

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