Still can't get pitted area on old switch to take solder. I'm using rosin
core solder with flux, but no go. BTW, it's a lead free flux - but the
only flux available @ local hw store if that makes any difference. I'm not
an expert on soldering by any means, but - would acid core stick - or
has metalurgy changed to where nothing will work? I no longer need this
switch, but would like to be able to repair it for practice and my own
curiosity.

Jim