We use a new non-toxic stripper, which the name unfortunately escapes me now. Not as quick as the old toxic strippers, you have to leave it on overnight. It takes off virtually anything, with old lacquers being the most difficult, as they turn to a gooey paste. If you strip your plane, most paint shops will discount the paint job quite a bit. There is a tremendous amount of labor & cost involved in stripping and disposing of the effluent. If you use an eco-friendly stripper, you can do sections and scrape it (using a phenolic scraper) onto plastic sheeting below the plane. Then you roll it up and toss it. You must be vary careful around the windows, as the stripper, any amount of it, will burn them. You need to use aluminum tape, overlapping the window, to strip. Then carefully do, by hand, the last bit near the window. Or strip and ruin the windows, and then replace them.
Personally, I do not really recommend bare aluminum. Paint is on there to protect the metal from the elements, not necessarily for decoration. Strip it off and you have to really work at keeping the plane clean and dry, especially the seams. Polishing actually removes some of your corrosion protection. Most skins are Alclad, a sandwich of magnesium alloy and aluminum. The magnesium makes a hard oxide that resists corrosion quite well. This layer is very thin, polish and its gone for the most part. Aside from that aspect, frequently you stripes will actually still be visible in the aluminum. For some reason, they tend to cause some difference in the metal making them visible after stripping. So even more aggressive polishing is required to make it go away, aggravating the aforementioned problems.
Polished aircraft can look cool, and if you want to spend your spare time keeping it up, ok. You just need to invest in a ton of Mother's polish a wagon load of rags and a overdeveloped right arm. You really do not want to keep it outdoors.