There isn't much that I can say about the jetpack build that can improve on the info in other threads on the TDH.I used them for inspiration myself.
As I described earlier, I used many layers of Humbrol colors changing values to bring out the structure ,light on the high points dark on the low,over a base of Testors non-buff aluminum.
Then I dry brushed Testors aluminum and some German silver and Chrome silver very carefully over most of the surface to give a worn metal look.
When I say dry brush I really mean very very little pigment! Take your time. Sealed everything with Testors Non-Buff Metalizer sealer.
The only change I made to this MOW pack was to rebuild the piano keys section because the parts were badly warped and had the wrong number of keys.
I replaced them with 3-D printed ones. They added a different texture to that area of the pack, and if subtle,I like that sort of thing.

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