A multitude of weapons and hours of elbow grease.
Wet and Dry 120, 180, 240, 440, 600
Drill : 120, 180, 320 flap wheels
Dremmel : varying light grit wheels
Them move onto....
Drill : 3 sized polishing mops, with 3 varying cutting and polishing compounds
Bench machine : 8" polishing mops, again 3 wheels for cut, cut and polish then finish with polish.
Back onto drill and dremmel with felt ends and polishing mops.
Let's just say it takes a long time and very frustrating as you need to bring the levels of grit evenly, ensuring all previous levels of abrasion are removed.
The bench machine polisher is my favourite as you get amazing results, only problem is my machine gets hot with lots of work.