Micromesh is a series of pads that go from a medium (relatively speaking) grit up to a fine polish. The abrasives are bonded to a pad to reach and follow the contours of the stem. It just takes a few seconds of polishing with each pad in successive order under running water. It will bring your stem up to a shiny reflective surface without the help of oils or waxes. But, I also suggest people use a microcrystalline wax, such as Renaissance Wax as a final wipe to prevent any further oxidization.What is micromesh?
You can find both the pads and the wax on Amazon or woodworking/metalworking craft sites.
I punch a hole in each pad and string them on a chain to make keeping them in successive order easier. I just work my way up the chain.