Dremel Rotary Tool and wire brush cleans traces

A fine wire brush mounted in a Rotary tool and contact cleaner will make the switch traces bright and shiny.   The idea is simply to remove oxidation, not metal.   See how the  electrical connector and rivits has been burned or corroded and needs to be surviced.   I drilled them out, Cleaned and wire brushed the connectors and re rivited them back onto the board.