What kind of glue? If it's hot glue, ugh. Try heating it and removing as much as you can without spreading it all over the place. If it's contact adhesive, you'll have to experiment with a solvent like acetone or lacquer thinner. And as for gaps...well, you could do a test on some by masking cleanly with tape on both sides of the gap/seam and try some silver or gray silicone caulking. The cybermen are silver, right? Just a thought anyway.