OK. Tonight I conducted a little experiment.
I stripped back the port side of the Horizontal Stab with the straight leading edge (the one not to use on this build!), and recoated it in Bleached Linnen (Top and bottom).
I then, using a bit of torn sponge, applied some Humbrol Maskall along the rib lines. Top and Bottom. (Notice that I am holding the item with Tweezers. The Masking fluid is very fragile (even when dry) and is easily lifted.
I then sprayed the streaked Olive Drab on the top and Light Blue on the bottom.
When the paint had dried, I then removed the masking fluid by rubbing along the edge or rib line with a tissue. You could use a cotton bud too I guess.
Now, this is a little over done (Obviously), but to my mind, it was a successful experiment.
It does show chipping along the rib lines and edges as I intended... I know now not to overdo the masking application...
I think that a spray of Tamiya Smoke here and there to blend things in a little would help.
All in all, this took me about 30 minutes, with paint changes, airbrush cleaning and paint drying time included.
I am now even more keen to strip the whole build back and use this method (a little more suruptitiously) over the whole project.
Cheers,
Hugh