Microwave cavity shows rust spots or peeling paint inside.

Safety first: Small rust spots can lead to arcing if metal is exposed. Address promptly.

Steps:

• Clean thoroughly: Remove all loose paint and rust flakes with a non-metallic scrub pad. Wipe clean and dry.
• Touch-up paint: Use only microwave-safe cavity touch-up paint recommended for appliances. Apply according to instructions and allow to cure fully before use.
• Avoid metal contact: Do not use metal scouring pads or utensils that can damage the coating.

If rust is extensive or metal is heavily exposed:

• Discontinue use and consult a technician. Severe cavity damage may not be repairable safely.