On a different note mate, what airbrush are you using? I seem to remember that you got hold of an H&S double action Evolution? If so, I reckon you could get a finer demarcation line (feathered edge) between any two colours you're spraying, I assume you're using acrylics as most ppl do nowadays and even I'm slowly going over to them. If so, what sort of dilution ratios are you using and are you using matt paints?