Which method is NOT typically used to remove old adhesives?

The method that is not typically used to remove old adhesives is the plasma cutter. Plasma cutters operate by utilizing a high-temperature plasma stream to cut through materials, mostly metals, rather than remove adhesives. While they can be effective for cutting through tough materials, they are not suitable for the delicate task of removing adhesives from surfaces.

In contrast, tools like heat guns can soften adhesives, making them easier to scrape away. A putty knife is a common hand tool for gently lifting and scraping off remnants of adhesive, providing a controlled method to avoid damaging the underlying material. Sanders can also be employed, though typically they are used for surface preparation or to sand down layers of adhesive rather than for the direct removal of glue.

Therefore, the plasma cutter is the least appropriate choice for adhesive removal, as its primary function is cutting rather than facilitating the dislodgement or breakdown of bonding substances.