The point seems to be you need a factory coloured nacelle with coloured material, not a painted one. BA might be able to order their custom colour from the factory.
I'm not sure if I understand you there, but IIRC BA's 787 frame was rolled off the assembly line with pale grey coloured engines. The blue was only recently painted.
I think what Airboche means is that the carbon fibre nacelles are made with pigment in them such that the nacelles are delivered to Boeing already in the correct colour for the airline. However, as we have seen with G-ZBJA's nacelles, this is not the case.
Or what Airboche might be saying is that in order to avoid the fuel penalty issues it might be possible to get a blue nacelle from the factory where the pigment is added during the manufacturing process as opposed to painted on afterwards. Might allow the laminar flow regime to be retained. Whether this is possible however I do not know.
Last Edit: Apr 24, 2013 15:57:27 GMT 1 by harty236