Anyone been down this road...?..Have a double pole power switch contact that shorted to its metal casing due to buildup of metal eroded filings from its casing. Its 45 years old. I have cleaned out the crud and polished the contacts a bit and clearly the contacts are pitted. Are these are copper contacts silver plated or tinned with nickel or silver and is it possible to restore this ? Pic attached with all 4 contacts dissassembled. Thanks.
