In aircraft work it became popular to use soda stripping as it was much quicker than chemical. However, we learned that this destroyed the pure-aluminum coating on the alloy underneath. This pure aluminum coating is to improve corrosion resistance, as the common alloys are much more prone to oxidation/corrosion of various sorts, even though they are much stronger than pure aluminum.
The type of corrosion that forms on aluminum can be quite varied, depending upon the nature and quality of heat treatment and alloy. Generally, the corrosion doesn't begin to be easily apparent for many years and even decades. This may or may not be impacted by dry, warm storage, as some of the corrosion can be purely a function of heat treatment gone wrong + stress. Excessive working of aluminum can speed up these types of corrosion (which is almost an incorrect term), so as Bernhard notes, if you don't know what you're doing you should keep your hands off.