It's done! I'm gonna call this Rubber ducky joy of joys when I squeeze you you make noise, I can't remember the last time I had so much fun painting.
Lessons learned about opaques: they are much more easy to use than I thought, can enhance transparents and don't look dull at all even when used as thick as possible, they are really useful to correct mistakes.
This is a close up of the ear, I didn't notice that some foam should be covering it and couldn't lift the paint to a white paper so... just used some pro white and blue to form the bubbles over the remaining orange, I think it worked pretty well:
I WANT GOUACHE!!!
Links to the whole WIP: step 1, step 2, step 3, step 4
13 hours ago