Need to be careful with the heat gun...it does a good job of bringing back the colour, but there is also risk of burning the plastic. Grand on a Transit, but not what you want to be doing on your pride and joy!

Without doubt gtechniq C4 is the market leader for trim restoration...it is expensive for the amount you get, but there is good reason...it works and its durable. Treating trim on a regular basis is a pain; so for the time you'd save alone; its worth it.

There are other options, that wouldnt be as durable, that double as tyre dressings, such as Orchards Glitz and Wolf's Chemicals Blackout, which if prepared well (as you need to do also for the C4) will last quite long.