Powder coated trims have been glued into place.  We couldn't agree so the bottom trim - most likely exposed to dirt & muck is hammertone to match rear wheel carrier.  The vertical trim and roof trim is straight black to match the generally black trim of wheel arches, mirrors, rubber boot, and visble engine parts.

The alloy trim to finish off the front and rear vertical edges have been laser cut and will now be sent off for  powder coating. Normally there would have been a cover strip glued over the wall corners to finish off but we have decided to enlarge these and make a feature of them - still trying to get away from the "freezer truck" look.  The trim along the lower edges - not shown - will be in hammertone while these vertical pieces and the roof edging will be straight black.

So . . . white cabin and shiny white fibreglass box on the rear = nice freezer truck.
We have been trying to think of features and colour to take the edge off or break that impression.  The rear bar is hammertone and there will be aluminium extrusion to cap all the joins and of course along the roof edge.  So now we have a white fibreglass box with aluminium edging. We don't have any opportunity to colour the fibreglass panel itself so the most that can happen in that area is stickers or vinyl wrapping. 

Having considered painting of the cabin to give some colour but of course also equals cost, we have retreated to simply having a black and white truck and to make it obvious that black is a trim colour as opposed to a colour that happens to be associated with a truck eg black tyres, black plastic mud guard.  So the lower trim  - including around wheel arches will be the hammertone finish leading back to the rear bar (the bull bar will also be hammertone when we get to it) .  The vertical trim and the edge of the roof will be powdercoated black.

Trying to get some picture of how it will look . . .