Thank you all very much for your encouraging comments.
After removing paint from the wings I decided to make them new from scratch. I do not know how it happened, but the shape of the lower wings was totally wrong.
So after a few days of filing and sanding, I made an attempt on preshading for the CDP.
This does not seem the right way to go.

Anyway, I will see what a few layers of CDP Gunze will bring, there is always the option of starting the fourth try.