Powdered Alodine
About 5 years ago I looked into powdered alodine in attempt to do the same to avoid hazmat fees. If I recall the powder once opened does not store well as it takes on moisture so the shelf life is relatively short. Also had a problem buying in small quantities. I went right to the manufacturer, Heinkel, and followed the supply chain in attempt to find a way to buy it only to decide the liquid is the best when all is considered. Aircraft Spruce was the cheapest last time I bought at about $12/gallon 4 years ago with 4 gallons to a case. I split a case with another builder to soften the blow of the hazmat charge.
Dick DeCramer
Northfield, MN
RV6 Flying 140hrs
Alodined throughout