Instead of a wood finish restoration business, you could offer owners of silver speaker cables a cable lifting service
. It might require opening several ebay accounts under different names.
Last week a neighbor told me her copper rain downspouts had been stolen, and that replacing them was expensive. After my initial surprise "you have
copper rain gutters
", she asked if I would keep my outdoor lights on all night to prevent the downspout lifting service guys from paying another visit. No problem I told her. I had recently put in some CFL lights, and I don't sweat using a 15 watt bulb all night.
So, a silver speaker cable lifting service might be lucrative. If not, you can always recycle copper rain downspouts.