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Removing Paint from Styrene Models - Model Railroader Magazine
Now I am trying 90% isopropyl alcohol and that does seem to work at some level. After an hour soaking, thin areas of the paint on the Walthers model started to come off, not lifting in sheets, but melting away slowly. On the back of the molded parts most is gone. But the 'finished' side of parts, such as the underframe, seem to have substantially more paint applied. Perhaps to make sure the color coverage is opaque and saturated to the eye.
Bob Kutella