I just had my 102 Roadster stripped in Reno, NV using Baking Soda. Cost about $2,000, but the result was most impressive. I have some rust-blasting yet to do, using sand, but the paint removal was excellent. There is some baking soda left in various places, but it dissolves in water and washes off with even a mild spray. Air blasts seem to get most of it out, but I expect to do the finish clean with water. The surface of the steel showed absolutely no deformity from the blasting. It left the original darkened patina of aged steel, presumably the way it looked before it was ever painted at the factory. You can find pics of the car after blasting in the 1900 - 2000 - 2600 section.
Now for the sand blasting to get rid of the rust. A bit more scary, as I don't want to abrade the surrounding to-be-painted areas.
Carson City, NV
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
102 Sprint (never did anything with it, but wish I had)
74 Berlina (first new car - now certainly rusted into oblivion)
61 Giulietta Spider G-Prod Race Car (where is it now?)
84 Spider Veloce (rarely drove it, so sold it)
86 Quadrifoglio (Dull car - no more 115s for me)
59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
1971 Alfa Montreal (see above comment regarding rationality)
Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
Zlin 50LA (+9 -6 gees, titanium spar, 1200 lbs, 260HP rumored to now be in Brazil)
1946 Luscombe 8A
Starduster Too (recently spotted at the Nevada City, CA airport - over 20 years and an entire continent separating it from our stewardship in Binghamton, NY)
1955 Cessna 170B (wife taught me to fly tailwheel in this)
64 Mooney M20E ("Rambo". My faithful steed for over 30 years) Nearly 50 years old, and just returned from a trip to Argentina in him
Newest in the fleet
1967 Piper Super Cub on Wipline amphibious floats (a true "all terrain vehicle")
2010 Triumph Thunderbird
You can snap roll an Alfa only one time...