Yeah, that's my impression as well. I hear what andy is saying, and its pretty good advice. But I found a LOT of variation whilst trolling the net for clues. Everything from a darker green through to many shades of grey, even a dull red-orange. Some were museum pieces. They appear to be not too concerned about authenticity, Im guessing because the engine and engine bay might only be viewed rarely by the visiting public. Maybe also the particular mark subtypes may have contained differences in the paint selection for the engine/engine bay.
Having said all that, I did go back and have another look in the net. I think ive found a reasonable rendition for the colour scheme. It's a museum site in England. I have the link at home and will post a link later today. Basically it confirms opinions we are expressing….grey, some charcoal around the gearbox, lighter silvering for the surface pipework, splashes of red and white tubing and control boxes (by the look of them) attached in various ways and places on the engine.
Last night I basically prepped the engine and engine mounts, which come as after market resin additions. I also cut apertures in preparation for the attachment of the mesh grills that are inserted to the inspection covers. I cut and trimmed the gearbox assembly and a fluted exhaust nozzle making sure everything fitted as it should. The engine bay is meant to slot into a gap behind the main crew positions and be glued to the two fuselage halves when I finally button them together.
I'm not entirely happy with that arrangement, as the engine bay can very easily slip or shift during the assembly process. I want to attach the engine cell to one of the fuselage halve first, but to do that I will need to make a connecting bracket, that will need to be very accurate as to length. If I can get it right the engine subassembly will be much more secure and im hoping that final assembly of the two halves wont be as problematic as im thinking