Coating on door handles MK3

Hello, I have read here a long time ago in a thread that this funny coating on the inner door handles at the Mondeo MK3 replaces itself over time. It was also talked about that you can remove this coating when it has become unsightly. So, now it is known that the built-in plastic is quite scratch-sensitive. Now I wanted to ask how you got this coating down? I hope you understand what I mean. Greeting Bernhard