I love it. I'd hit it with some light grey or silver Rhino lining. I think the textured look with the refined smooth lines coming our of the top would look killer.
Just realized you're from across the pond and you may not be familiar with Rhino Lining. It's a spray on truck bed liner. Orange peel type texture, super tough.
If you decide to go that route, and can get your hands on it, try Rustoleum's Spray on liner, its a fraction of the cost and extremely tough. Plus I was able to cover a boat trailer with like two cans. Just my humble opinion.