When I do my own polishing, I use Flitz, Brasso, car wax, Pledge and shoe polish. All produce different results on different surfaces at different stages of the polish process.
Not all machines need all of the above. Not all surfaces need all of the above. You learn over a period of time what works best for each. Black rubber bumpers look great, (for the most part), if you go over them with back paste shoe polish and buff it off. Then if you use just a touch of Pledge on a cloth and go over that, the shine is even better--most of the time. Most paste shoe polish is oil based and the rubber will benefit from it. Sometimes Armor All does the trick as well.
It is a process of testing to see what works best. Most painted surfaces look wonderful after a treatment of ColorX by Meguiar's car wax. A second treatment can even produce better results.
Just play around with what is out there and available and you will find what works best for you on whatever you are working on.