Dialux range of compound work with the following system-

Pre-Polishing

Polishing

Mirror Polishing

Pre-polishing compounds have more cut and less finish, the Polishing compounds have a good balance of cut and finishing and then Mirror polishing compounds as designed just to finish (so you get very  high reflective mirror finishing but little cut)

Here is  my quick take on Dialux Compounds-

Gold- Mirror polishing Dialux Red     Polishing Dialux White    Pre Polishing Dialux Yellow

Silver- Mirror polishing Dialux Black     Polishing Dialux White      Pre Polishing Dialux Yellow

Hard metals such as Stainless Steel, Steels, Chromium, Platinum etc-  

Mirror polishing Dialux Green    Polishing Dialux Blue or Dialux grey     Pre Polishing Dialux Orange

Plastics- Mirror Polishing- Dialux Blue     Polishing Dialux White      Pre Polishing Dialux Yellow