I've used citrus stripper and non citrus-based chemical strippers with mixed results. It does a pretty good job on pieces that were not alodined before factory painting, but a lousy job on panels that were alodined then had the factory paint applied. The factory paint holds on to alodined aluminum for dear life and though it could be removed after several applications of stripper, it took LOTS and LOTS of elbow grease.
I'd do what I could with chemical strippers then maybe finish up any tough areas with mechanical stripping, though I don't have any experience having stuff media blasted.
--Mark
1973 SIII 109 RHD 2.5NA Diesel
0-54mph in just under 11.5 minutes
(9.7 minutes now that she's a 3-door).