On Mon, 03 Jun 2019 10:53:23 +0100
"Dave Plowman (News)" wrote:

Bit of thread drift here. The old Rover has lots of switches all of
the same make and basic design. Those that handle a reasonable
current are pretty reliable. But some only control relays, so a tiny
current, and need cleaning regularly. Contacts on all are plain
copper, with no wiping action, and they corrode. Wondered if silver
plating the contacts would help? Or any other DIY plating?

Silver is the better conductor but gold is better for resisting
corrosion.