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This finish would look great on my dust-collection pipes in my woodworking shop. But 50+ feet of 4-inch PVC would take a lot of rasping, sanding and painting. Lots of elbows and connectors, too. But what an amazing look it could be. Hmmm. Just thinking...
Use Ghost speaker wire for power. It is extremely flat, has two wires, and is already insulated. The wire is designed to put on a wall and hide with paint. www.amazon.com/Sewell-Ghost-Adhesive-Speaker-Conductor/dp/B005SUM1PO
You could use a specialty speaker wire instead of cutting your own copper strips. It is extremely flat, has two wires, and is already insulated. The wire is designed for placement on a wall and hidden with paint.
This gave me a crazy idea: In my woodworking shop, the dust-collection system is made mostly of 4-inch PVC. How great (and appropriate) would it look to have "wood logs" running all over the shop? Big project, however.