Rust in the ceiling, corners of microwave; also on the door

Hello -

Yes the rusted areas inside a microwave oven can be repainted.

First, you will need appliance paint which is designated for microwave interior use. Check with your local hardware store or local home improvements store to find out what paints they sell which fit the criteria for "microwave cavity paint."

You can read directions for how to go about the project:
https://www.doityourself.com/stry/how-to-repaint-the-inside-of-a-microwave

Read the instructions through, completely, before starting on your project so you know what supplies you need to have available and what steps need to be followed before starting.

Best wishes.

The oven cavity will probably start to rust where the paint is gone. If you're up to it, sand it and paint it with a color that matches the interior color. Other then colors, there is nothing special about paint inside a microwave.

Disassembling the door is a major pain and the streaks will likely only be faded not removed completely. Best solution is replace the door. Otherwise taking it apart(and not damaging it) is your only option.
Eric

call kitchenaid and complain they might fix it under warranty or replace the unit,, or possibly heard of this and have a fix i persoonally never heard about it good luck mate

Too generic...Did you use the high-temp appliance enamel recommended, or a spray...or worse?

Was the rust inside where it can contact food through the circulating air, or on the outer body?

First thought based on how I read the question: Never use that machine again...but that's based on the word "in" instead of "on my microwave".

If the rust was around the door frame, outside the seals, and you used an enamel (of course) then you may be OK...but...
Considering the fact that a cheap microwave is a drop in the bucket when compared to your family's health...Why risk it?

It would appear that no one knows how tofix this problem. I have the same problem and the only sugestions I get is to replace the door.

Any chemical that is corrosive can cause this, so yes it could be from drugs. Discard right away.

This is just okay but if you're quite doubtful you may bring this to any appliance service center for repaint

just use sand paper to clean the rust then use some high temperature paint (sold in tins) eg spray paint but it must be labeled high temperature and spray 2 to 3 coats . your microwave should be safe again

replace plastic inner and check any rust is there, check inside body and compleat door.