Plastic changes from a solid to a liquid when subjected to heat. This chemical process can be witnessed firsthand when a plastic spoon or bag comes in contact with a hot cast-iron object such as a pan. What is left after the encounter is a melted mess that is very difficult to remove. When allowed to cool, the plastic hardens to its original state and remains stuck to the cast-iron pan.
Step 1
Place the cast-iron object in the freezer and allow it to chill for 2 or 3 hours.
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Step 2
Remove the item from the freezer and place on a secure, flat surface.
Step 3
Chip away at the frozen plastic with a spatula or other blunt object.
Step 4
Soak a cloth with a quarter-sized puddle of nail polish remover.
Step 5
Wipe the melted plastic with the cloth saturated in nail polish remover. Keep rubbing until the plastic is removed.
Step 6
Wash the excess polish off the surface with dish soap and warm water.
Step 7
Spray the surface of the melted plastic and surrounding area with a silicone spray such as WD-40 3-in-One.
Step 8
Peel up the spray and the plastic using a razor blade.
Step 9
Continue scraping plastic until it all has been removed. You might need to add more spray for tough-to-remove areas.
Step 10
Wipe any excess silicone spray off the surface once all plastic is removed.