Mast painting
Rick, you didn't say if your mast was painted already, only that you didn't want to paint. Bare aluminum masts are generally anodized which seals the aluminum from oxidizing but only while the anodize is intact. Over time it wears away from rubbing, chafing, weather and the like. If your mast is not painted this would be a good time to give it a good cleaning and a few coats of wax. This won't restore the anodize but does help to seal the aluminum. In the future the waxing can be done from a bosuns chair every couple of years without unstepping the mast. If you do chose to paint, do yourself a favor and do it right. Most of the end result of any paint job is in the prep. What ever primer and paint system you use, follow the clean, prep and painting instructions from the manufacturer, have confidence in your own ability to follow those instructions and you shouldn't have to repaint for a few years. This is also a good time to strip the mast of hardware to eliminate masking and it will also give you a chance to deal with any corrosion problems. Whatever you decide to do have fun and good luck.