Thanks f2k, I know exactly what you're saying. The problem is that the real tank never had any markings and, unlike other mass production tanks where you get a bit of creative licence, this is a one off.  Also you can add interest on other tanks with on board tools, stowage, etc... again this example had none of that. I've tried to make the weathering interesting without going ott but I'll have a think if I could add any more. As you say it is a big beast in a single colour but I've alreadu weathered it heavier than the original.

Thanks for your input though, always appreciated!