On Fri, 10 Jun 2005 17:44:35 +0100, Chris Bacon
wrote:

Don't use Brasso.

Rubbish, total ablls, Brasso is a good polish for aluminium (also
Perspex, etc). Google "brasso aluminium".

Brasso is a soft tripoli in a liquid medium. Tripoli is an appropriate
polishing medium for soft metals like aluminium and is pretty good for
some harder plastics too. It won't make a dent in chrome though, hence
the existence of Solvol Autosol. However the choice of liquid for Brasso
is chosen for cuprous metals, and it's not a good choice for aluminium
of plastics.

In particular, it's hard to polish plastics with a liquid medium and a
standard mop. You're much better off with a paste medium. A hard mop is
too likely to burn the surface on plastics, unless you arrange a lapping
machine.

Unless you clean it carefully afterwards, you can get discolouring,
because of the ammonia in it.

Well, duh.

As you know everything about everything, perhaps you'd like to explain
to us _why_ Brasso uses ammonia, and why this is an irrelevance (and
potentially a harmfully discolouring one) for aluminium.