Hi Remco
the interior colours, at some point later in the war they went all grey-green, but apart from the cockpit the rest of the internals, engine, gun bays, wheel wells etc are aluminium paint, same in Hurricanes BTW.
The outer part of the wheel well is the underside colour from studying photos.
I've not gone through the entire 30 pages recently, but the points on careful construction are detailed.
The Undercarriage leg attachment is a poor design, suggest gluing top and bottom parts, drill through from the top, to allow for a metal pin, and the cut leg, and attach later, if that makes sense, it will do if you look at the kit!
Rivets....well, Spitfire wings are flush riveted, but the leading edge 'D' section is ...oh, cut n paste time
http://www.britmodeller.com/forums/index.php?/topic/234986185-148-airfix-new-tool-spitfire-mki-x4382-from-no602-squadron-completed-on-31-10-at-1150-pm/page-2a couple of points. Eduard made a boob on their Spitfire, in that the front of the wing, the 'D' section leading edge is made of thicker gauge metal, and the rivets are filled and rubbed down, they are pretty much invisible on the real thing. Check your own photos, but here's one, note smoothness of leading edge, same on top.
http://data3.primeportal.net/hangar/mark_hayward/supermarine_spitfire_mk1a_p9444/images/supermarine_spitfire_mk1a_p9444_03_of_37.jpg from
http://www.primeportal.net/hangar/mark_hayward/supermarine_spitfire_mk1a_p9444/index.php?Page=1the other wing rivets are flush too, but the skinning is thinner, and show up more as dishing of the metal. This is a Mk I but apart from the cannons a Vb is pretty much the same, and this has shots of the underside which you usually don't get to see.
there is a Vb walkround here
http://www.primeportal.net/hangar/mark_hayward/supermarine_spitfire_vb_bm597/lots of useful detail.
note a lot of the fuselage used dome head rivets, also note the overlapping panels
http://data3.primeportal.net/hangar/mark_hayward/supermarine_spitfire_vb_bm597/images/supermarine_spitfire_vb_bm597_36_of_43.jpgThere is a
trend among modeller's, especially the Czech to use recessed rivet tools, and modeller's looks at other models and round and round it goes, but the other Britmodeller link the builder uses HGW postive rivets on the fuselage to great effect.
stunning build, lots of good tips.
Note, unless you get really close, you just don't see the rivets at all.
Have a look at the walkround photos, it's a cosseted warbird photographed with a modern camera, and even then they are not that visible.