Which brakevan looks worst?

Ya know the little brakevan/coaches that come with some old TOMY and Trackmaster stuff? The ones with no buffers and are all one color throughout. I got a set of 4 of these brakevans for Christmas and want to use the ladder pieces on the corners from one of them to make Henrietta look more accurate. I was wondering if I could get some input from you guys here on BPT on which of the following colors are least likely to be seen on a British/heritage railway and/or look worst. Light Blue, Green, Olive (like Diesel 10), and Red.
Also, what's a good tool for removing specific chunks of plastic from these kinds of toys. Would help greatly for this project, as well as my Derek project.



Now that I'm off my phone I'm able to put this pic here; tehse are the ones I have