Cleaning out seat posts and fork stems
Double a piece of heavy wire over and hammer the loop on the end closed so that the two wires lay parallel to each other. Cut the loose ends flush and chuck the ends into a drill. Take a small bit of cloth and string it between the wires at the end where the bend is. Soak the rag in WD 40 or some other degreaser and place the rag into the tube. Use the drill to spin the rag and clean out the old grease and rust.
You can also chuck up a strip of emery cloth or sandpaper in the wire mandrel to clean out badly rusted tubes (just be sure the dust isn't dumping down the tube into a closed BB and contaminating the bearings).
Ganzen