Meguiars for me. Their quick detailer spray is amazing, I very rarely do a full wash any more.
Anyone found a polish that works on the fuel filler cap though? Mine is not looking very good
Is it aluminium? I have one on my plus8 and I use Autosol then Meguiars fine polish with a wax finish. It doesn't remain shiny for that long...i reckon 3 polishes a year. I haven't tried a clear lacquer yet, that may seal the finish for longer? There are also surface treatment compounds to give supposed longer protection, many described as "nano compounds" etc. I haven't tried any yet...
The Meguiars fine polush does give a good finish. If your filler cap is chrome/stainless then it will be a harder metal so longer needed to polish with a chrome/stainless polish.
Horses for courses re polish to use.