The only thing I've ever heard about acid dip was if they don't neutralize all the acid -- it can get between pinch welded seams and come out "later"...
But I think that's what I'd do for a full on strip.... acid and E-coat....
I only ever had walnut shells on my Corvette restorations.
I have a 50lb box of them sitting in the shed now -- never loaded 'em into the machine.... I'm always in too much of a hurry to get "whatever" off of "whatever".... LOL
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