Go BT Yellow - its the only way forward.
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Its not to everone's taste, but when I fist got it, I got the ump with everyone say " when are you going to paint it green then". It stayed yellow ever since.
Understand, most people can't stand it. I have to say that its not my favorite either but thats how it came and thats how I have painted it ever since.
If it came blue then keep it blue - looks nice.
They all look the same when caked in mud and dents anyhow
Marine blue gets my vote.
When I did this one - 2 tubs of synthetic enamel did the whole thing - total cost £18. Oh, plus a half decent paintbrush.