About a year ago, I purchased a box of 2nd hand Space Marines, and I had intentions of painting them up into the "United Nations" colours. I tried a few test models, but I wasn't entirely satisfied. Which was more of an issue with my painting skill, rather than my colour scheme. So, instead I looked for a different colour scheme, and I think I have found something I like. Here are a few samples of what I want to do.
Here is the original colour scheme for th "United Nations" Marines.