Paint inside microwave oven bottom is peeling

Yes it is a certain danger, DO NOT USE your microwave until this has been repaired. You should be able to get specialist paint and kit from your local hardware store. Here's a handy kit I found online:

Microwave Oven painted lining repair kit MSC TOUCHUPKIT

I wouldn't advise trying to fix it and it's not dangerous. When heating food it causes condensation on the inside of the oven which pools at the bottom and causes rust and paint peel.

If it's paint peeling, then once that paint is gone, rust will set in, which can cause arcing and disintegration of the chassis, when ruins the oven.

This peeling is usually the result of excess moisture accumulating in the oven due to blocked air vents or poor fan circulation.

Once those two issues have been ruled out or dealt with, then always be sure to dry out or leave the microwave open after use.

The peeling paint will need to be removed, then the area should be sanded.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

affected area would need to be sanded and re-painted with microwave paint. repairclinic.com sells the paint

NO. The insides are baked on powder coat. If you paint it, you might as well throw it away. The paint can catch fire, even after it is dry.

HELLO' WITH IT BEING INSIDE A MICROWAVE I'LD ALSO BE WORRIED ABOUT RADIATION POISON SOUNDS LIKE ITS TIME FOR A NEW MICROWAVE

1) How is the cavity damaged? Is it just peeling paint, or is it rust? If it's rust then the microwave could be dangerous.

2) The antenna cap usually has a small hole in the centre, but if there are any other holes in it the magnetron itself could be damaged, and holes caused by the magnetrin arcing.

No, if the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

Otherwise, you can have rust and arcing, which can be messy.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Here is a link to buy the paint.
If the microwave is not creating a spark inside when in use, It's OK to use.

You need to thoroughly clean it, then sand it smooth to removew all the loose paint.

Once it's squeaky clean and dry, you can apply high-temperature appliance paint, which is available in brush-on or spray-on form at big box stores like Wal-Mart, home improvement centers like Lowe's and appliance parts stores.