John Schmitt wrote:
On Wed, 19 Oct 2005 13:07:57 +0100, The3rd Earl Of Derby
wrote:

We have a stainless steel cooker hood which shows finger marks. What
is the best method of cleaning so that marks are not left
Blair

Bleach.

Excellent. Not. Chlorides are excellent corrosive agents for most
metals. While bleach is hypochlorite, it degenerates to the chloride
both spontaneously and in contact with reducing agents. As it does
this, the potential for an electrochemical cell exists. For machining
SS, chlorinated cutting fluids are normally used to prevent the
(almost instantaneous) formation of the very hard chromium oxide
layer by instead forming the chloride. The chloride is soft and so
the tool life is greatly prolonged.

John Schmitt

Hmmm! my sink is still in its pristine condition from new 4 years ago,
allways bleach it down after washing up also makes the taps sparkle as does
the cutlery.

In the very long term your probably right, but hey i'm not interested with
the boring science of it all.
--
Sir Benjamin Middlethwaite