Thanks, Theuns. And what a sweet-looking aircraft! Great yellow livery!
And yeah--pin-washes!! Either they want to come off altogether, or they don't want to budge at all.
By trial and error with numerous situations similar to yours, I've found that it sometimes works to use one of the blue-coloured window washing solutions--in the states "Windex."
Sometimes it also works to use water or Windex on the end of a toothpick and gently rub it off. Had to do this on the Hurricane with the wash I used around the landing gear legs.
Of course, sometimes neither of these works at all.
Nevertheless, great work on the DH and the Apache.