One more thing I would like to mention, those power switches are coming from
audio equipment such as amplifier, CD player.

Thanks

Eric

"Eric" wrote in message
...
Most of the old equipment has power supply switch problem. The contacts
arc
by electric power and need to be replaced or sand down to refinish the
surfaces to prevent resistance build up. After the resurfacing surface,
is
there any chemical can prevent the arc again and the oxidation coming
back?
I am using the de-ox cleaner now, any other suggestions.

Thanks

Eric