How easy to fit 98651463402… small trim piece

[Triops]

Mines got ‘spider corrosion’ I could rub it down I guess but new ones ex ‘design911’ aren’t crazy money about £18. It’s the small metal strip directly behind the door, black colour. It is shown in the attached image ‘toothed’ looking piece at the bottom left of the image no 14. Or I could rub it down and delicately paint.

Part number 14 picture set 811-13

https://www.design911.com/uploads/images/diagrams/diagrams/986_2004_8_11_811-13.jpg?width=545&height=628

Can’t upload a picture. Can anyone help me on this one?