As far as I know, only the roof part (above the gutter) was painted white on the EarlyBays, but I also prefer the white to start at the belt line, and will do the same once my Bus gets repainted. After all, it is the new South Africa and all colours should be treated evenly - and don't anyone dare to discriminate against white! 
I believe one of the main reasons for a Bus roof being white, is to keep it cool
(reflects sunrays?)
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