OK, that didn't go as well as I hoped.............................
I applied the masking fluid, with a brush, to the undersides, making a smooth line between olive drab & slilver. After letting the fluid dry for a couple of hours, I sprayed the uppersurfaces with Hataka A018 US Olive Drab - which went on nicely.
I let this dry for a few hours, then started to peel off the mask. Sadly, instead of leaving a smooth line, the masking took off small bits of the olive drab.................
I got the demarcation line in just about the right place, as you cant see ( much ) OD from below.
I think that the dried OD paint is a little flexible ( like a skin ), and the removal of the mask is just enough to take small bits off.
I'll have to resort to the hairy stick to clean up the edges.
It was an experiment, to see if the fluid would be an easier way to do the split, and it didn't really work. I should have gone with my first thought - brush painting the demarcation line, then filling in with the
airbrush!
Using the masking fluid on small areas, like cockpit canopies, works, but with the acrylic paint, it's problematical!
Dave