Non-stick pans are coated with a synthetic polymer called PTFE, for polytetrafluoroethylene. Although thrifty home cooks might want to recoat non-stick pans that have become damaged or worn, the coating process is not practical to do at home.
Recoating a non-stick pan involves using a factory process at very high heat, a process which is best suited for industrial use. The Michigan State University Extension says it would be too expensive to use this process to recoat a single pan.
Some people have reported on Internet boards that, in the past, they were able to recoat non-stick pans using a special type of aerosol spray. That spray is no longer available on the market.
Even if it were possible to recoat a single non-stick pan, it would be cheaper to just buy a new pan.
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