Microwave samsung fully working, but inside is not the same paint

The microwave is working, but the interior paint was damaged and we repainted it incorrectly. The paint stinks if you turn on the microwave (((We didn’t turn it on for a long time, suddenly something happens. The “golden generation” microwave is one of those that were made to work for a long time, and not break after six months. We ruined it - scratched and chipped off the paint. Ourselves I would use it further, but I don’t want to bother, I’ve already bought a new one.At first, the paint began to peel off, then they barely repainted it, just like the wrong paint in the end.Tired.As they painted it, the open button began to stick.Probably you can clean it, but I don’t know how.Take it if you know how to paint microwaves - otherwise it is in good condition.