Every one I get starts paint peeling inside the door at the bottom in front of the glass disc. I've heard that this is because burnt on food starts the process. I keep it clean. I give them away when this happens. I've heard you can sand it down and there is microwave paint you can apply to remedy this. Anyone used this paint before ?
Buy a microwave that doesn't have paint inside.
Our combination Panasonic has no interior paint and our previous Samsung had none either. No paint- no peeling.
This can be due to excess water being left in it. Cooking food inside the microwave can produce a lot of steam, wiping it out each time is OK, but you need to dry it with paper towel too, leaving no residue food deposits. Failing that, I agree with gingerbee, get your next one with a stainless steel interior.
My microwave is a Matsui, 27 years old. The interior is white - presumably powder coating. There is no sign of deterioration and I do not pay particularly close attention to cleaning it.
I brought my microwave from tesco -(cheapest one they had) for £35 about 4 years ago. No paint peeling inside. I wipe it out after using then give it a quick dry with paper towel then leave the door slightly ajar over night. Still looks brand new inside.