Hi, Just got a model 1G-72 Heath Audio Generator that is in great shape both Electrically and Mechanically with one exception, there is old Scotch or Cellophane on the meter face. I am at a loss as to how to get the tape off with out scratching or using a safe solvent or chemical will loosen the tape without damaging the meter face any further. I would appreciate any idea's. Thanks, jim heath/w8ngo