After a second cote of primer to check the seams, I could start to paint the underside in neutral grey.

This is the first time I use Hataka acrylic colours. I started with the paint directly from the bottle, but it clogged the nozzle pretty fast. After diluting it, it was a lot easier to paint. A good thing with the Hataka paints is that there is a ball that helps when shaking the bottle.
I will mask for the medium green colour and see how that turns out. I’ll try to get softly feathered edges.