Solvents for removing very old masking tape from front panels?

One method I haven't seen discussed is to use a steam cleaner. I did this to successfully remove masking tape residue, but it was fairly time consuming. However, it had the advantage that it didn't involve any solvents. Obviously, significant heat and moisture can be applied when cleaning with steam, so that is something to consider. I removed metal covers from a Tektronix terminal cabinet in order to clean them with the steam cleaner. I also used it to clean a CDC display console cabinet. -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>