[Gorillajin]

Hello
I am about to DIY to remove scratches on my car. Since it's 14 years old, there are a lot of dings, scratches, and etc. Some areas like bottom front bumper, I need to take it to a shop to repaint it, but I want to get rid of small scratches included (keyed deep scratches) my own.
Could you guys suggest good products, and some advice or tips on how to remove all the scratches?

Thank you.