That done small lengths of lead wire were glued in place before painting with Vallejo Hull Red. To pick out the detail and to leave a grimy finish, some Abteilung shadow brown was thinned and applied as a pin wash. And that was the engine done. 
Airframe…
As is normal for my models I wanted to rivet the airframe. I find the easiest way to do this is to remove the main components from the sprue, clean up the attachment points and then spray a thin coat of Alclad primer before buffing the surface with a Master Caster’s Miracle Polisher. It doesn’t need to be buffed, just smooth out the rough bits. The idea behind this is to provide a key for the rivet wheel. My riveter device of choice is from RB Productions, I like it because it’s a series of different gauge photo etched (steel) rivet wheels which are interchangeable for different spaced rivets. Not having a rivet plan to hand I took an educated guess seeing I rivet practically every model and so I have a good grasp of typical patterns. 
