Thank you Carl I'm still waiting for the rest of AM
Hi Gigant, well for the numbers I've got a decals from the kit and it's a brand new - from 2014
For the rest - masking, painting with yellow paint, weathering, etc.
For the second question - at first I thought like you, that this is a frozen condensation, BUT if you look very carefully the belly numbers - the big once, the right float at the wing and right engine flaps you will see the missing paint and I thing this is an ordinary chipping paint, and
the picture was taken just before re-newing and repainting the real birdy.
Never know for sure