I bought my American Air Skis at a garage sale for a few $$ over 20 years ago. Never really knew what they were. I've since done some research and found they were manufactured in Clare, Michigan. They used a very high-grade magnesium called O-1 HTA that was developed by Dow Chemical in Midland, Michigan for military aircraft in WWII. I live in the area and never knew of any of this. Obviously, the skis did not work well. Although the O-1 HTA was found to slide very well on snow, it was inconsistent when actually skiing from one type of snow to another and they did not wax well (there is a lot of residual wax on the bottoms of mine). They also did not have good flex properties compared to conventional wood skis of the day. Not sure when they finally went out of business.
See original 1947 newspaper article here: http://condor.cmich.edu/cdm/ref/collection/claresent2/id/48933
Thanks for posting this article! Very interesting!