Hi Aresius, Looking good your next step to bring it back to less of a baby blue is to make up a wash of the primary colour and use it as a wash realy diluted which will pull the colours back in. You could think about working the highlights back up with a brush on each pannel, after that a darker diluted blue to give shadow on pannels. . this will give you more deffinition between the sheets of metal.
hope this idea will work for you. nice job on the white lining, you could also use a wash to get into the crevices.
Top job on the airbrush work.