While chemical cleaning requires less energy than mechanical means, it has at least one serious drawback. Capillary action draws the corrosive mixture into the seams between panels, around windows and under rivet heads. It is next to impossible to remove the residue from these crevices and so these areas all begin to corrode. I would advise against it.
"Not all who are laundering are washed" say Bill & Heidi
'78 Excella 500,"The Silver Pullit". vacuum over hydraulic disc brakes, center bath, rear twin. '67 Travelall 1200 B 4X4 WBCCI 3737