I'm having my seven-year-old Cross Check frame stripped down and powder coated. In the process I'm also having some simple modifications done such as removing the derailleur hanger, rear brake bosses and all cable stops -- this bike is only used as a fixed-gear commuter.

I use front and rear dynamo lights for this bike. I don't mind having the wires along my front fork, but for the rear the wires are a bit of a bummer. If there's a simple modification that can be made while the frame is stripped down, I'd love to ask the person who is doing the work to give it a shot.

Any thoughts or suggestions?

I'm currently using a fender-mounted tail light, and I have the wires zip-tied down the down tube, under the bottom bracket, and then run along the inside of my rear fender to the light. (Inside the fender I have the wires held in place with a healthy bead of caulking.)

One idea I have is to see about having a conduit welded along the down tube before the powder coat is applied. Has anyone tried that?

(Yes, I'm aware that economically I'd be better off to sell the frame on eBay and buy something new, but I'm okay with going this route.)