Thanks chaps.
Some progress has been made, but I need to buy a new tin of matt yellow, to re-paint the main oxygen tanks.
It seems the problem is actually the paint, and not the resin the tanks are made from. The current tin is Humbrol matt 154, "Insignia Yellow" ( I normally use their "Trainer Yellow" ), and no matter how long it is stirred, it remains "oily" and almost translucent. It's as if the pigment is not being fully dissolved into the carrier emulsion, and brushes rather like melted butter, so maybe it's just a bad batch.
I'll see if the local art shop has some "Trainer Yellow" when I go into town, probably on Friday, then strip, or at least thin the current coating, and re-paint the tanks. The pic below shows the horrible finish, and brownish tinge left after three brushed coats.
Anyway, things are moving forward on the starboard fuselage half, with the "walkaround" oxygen bottles painted and attached to the waist gun "tub", and the "tub" and vertical ammo boxes installed into the fuselage. I opted not to use the decals supplied with the Eduard bottles, choosing to paint the regulator dials instead.
The "tub" and rear fuselage section have had some paint scuffing added, showing wear into the zinc chromate base coat, and some paint chipping and wear revealing bare metal. The lighting in the photos makes this appear a little harsh, but it looks much more convincing to the Mk1 eyeball.
Representations of the (empty) ammo chutes to the rear turret have also been made and fitted. The real chutes had stainless steel tubular outer edge frames on a flat "track", but for simplicity, the chutes were made from "Evergreen" channel, and painted in a bright silver finish, which, considering they will only just be visible, should be good enough. I omitted any support brackets for the same reason - they won't be seen !
The tracks deliberately lack any ammunition, as the diorama will also depict an armourer preparing ammo for loading into the aircraft, as it is brought from the tractor and trailer already shown much earlier in the build.
I still have to install the main oxygen tanks (once re-painted), and the flexible ammo feed chute for the waist gun on this fuselage half, as well as the scanning windows (when I've made them) and the open waist hatch and entrance hatch, and also carry out some detail painting, before moving on to the port fuselage half, which has less detail to fit and paint.
Pics below show the progress to date, and I'll be back with another up-date soon(ish).