Plexiglass is an alternative product used by many companies to substitute real glass. This material is much tougher, lighter and more malleable as well as inexpensive to make for items such as windows, picture frames and even aquariums. For one reason or another, you may find glue residue on Plexiglass such as from a sticker or an art project perhaps. Glue residue can be a problem to remove and even ruin the aesthetic quality of the Plexiglass. But removing glue from Plexiglass is actually quite easy.
Scrape off persistent glue pieces with a utility blade. Use sliding motions at the base of the glue marks to avoid damaging the glass surface. Ensure that the blade is new, otherwise a rusty blade will scratch the Plexiglass.
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Apply turpentine to a soft cloth. Rub the cloth onto the glue. Additionally, you can use rubbing alcohol, fingernail polish or acetone.
Use commercial products designed for removing persistent residue, including glue. Examples of these types of removers are Goof-Off or Goo Gone, which can be bought at your local hardware store or home center.
Put a pack of dry ice onto the glue and wait until the glue is chilled. The glue should be brittle enough to pop out with a tool such as a plastic utensil, credit card or firm plastic material to prevent any scratches during the removal process.
Cut a lemon and pour some drops onto the glue, then apply table salt over it. Wait a few moments while this solution dissolves and weakens the glue. Wipe the solution off and rub away the glue particles with a soft cloth or hand towel.