Well, I managed to finally complete the engine and it's ignition harness. 36 separate wires going to each plug. That was a lot of work but the engine looks much better with them than without. I began by painting the assembly Alclad Airframe Aluminum followed by a dirty wash of Flory Black. I sealed that all in and painted the push rod tubes gloss black and then added the 0.010 dia brass wire to each cylinder's plugs. I followed all that up with a heavy application of Tamiya clear smoke to darken the whole thing down a bit. I like to leave then glossy as it gives the engine an "oily" look.
I am currently removing seems from the fuselage and should be ready for primer in the next few days.