I've blasted alot of aluminum in my career with many different medias, such as walnut shells, silica glass beads, coal slag, play sand, soda, etc. and the results very depending on what you are trying to accomplish. I have never seen 2024-T3 distort if done by a competent person. Don't dwell on one spot, watch your air pressure and nozzle size. Blasting will remove alclad quickly and will leave a very dull finish. It is mostly used in the avaition industry to remove corrosion, and this it does well. I know that experiments were tried using dry ice beads but I do not how it worked out. If I were prepping an Airstream for painting I would most likely blast it, But to remove just clearcoat I would use a chemical stripper. Blasting just would not be worth the extra effort protecting the areas not needing blasted like windows and such.
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