I don’t agree Richard. Both spraying and brushing can give excellent results when done well, and bad results when done badly. The difference is that spraying takes all the effort out of it 
Going back to the OP, if you go for white over colour, could you first shoot a coat of white primer over the masked model to build the colour opacity before you go for the top coat Andy?

Going back to the OP, if you go for white over colour, could you first shoot a coat of white primer over the masked model to build the colour opacity before you go for the top coat Andy?
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