To remove melted plastic off metal, either chill the plastic until it becomes brittle enough to break off or heat it until it becomes flexible enough to be scraped off. After removing the plastic, it is also advisable to buff the area with WD-40, nail polish remover, rubbing alcohol, or, in extreme circumstances, fine steel wool or fine-grit sandpaper.
Plastic that has melted should not be burned, as this produces poisonous gases. Place the oven rack or other small to medium-sized metal object in the freezer until the plastic becomes brittle. The plastic can then be removed using a razor blade or a hammer to scrape or carefully break it off. Using a hair dryer to heat the plastic before attempting to scrape it off with a razor blade is another efficient technique for removing melted plastic off metal. If the metal in question is the heating plate of a garment iron, remove the plastic by passing the iron over a piece of salted aluminium foil. The salt will aid in separating the plastic from the metal and making removal easier.