If you've got a Battery Charger and a box of Washing Soda, you can do it.

I haven't done it yet, but I plan to. I have to find a plastic tray long enough for barrels. I'll use a piece of U shaped steel from the scrapyard for the piece that collects the rust. I'll then make wood blocks to suspend the tubes inside the flanges of the angle iron, so rust is removed on three sides at once. Rotating the tubes will be easy with the blocks.

I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.