Not really home improvement but a little DIY

I have a set of cooking pans that are great - but they are now over forty years old and the knobs and handles look worn. Trying to find replacement handle is iffy in my opinion - knobs not so much. But I had a thought - I know there are heat resistant paints.

What would be the best paints to paint these handles and knobs? I am not sure what the material they are made of - some sort of plastic or something.