Anyone got a suggestion for what I can use to get dried on masking tape and its adhesive residue removed from some airplane windows?  This is on a Lake LA4 and I suspect the windows are polycarbonate.   Any help would be appreciated.  TIA

  <Marv>
 

I guess I’d think it more likely they are acrylic, but I don’t know.  In any case I’d try vinegar; and if that doesn’t work, I’d use “Goof-Off”. Apply only long enough to remove, then wipe dry.  I’ve used it on my acrylic windows with good results, and it’s been about 5 years since, and there is no sign of any effect on the acrylic.

Al