Tres bien! Thanks for all the fantastic photos!
Closest I ever got to any of this was building 1/72 tanks and troops for table-top wargaming. Everyone else had their troops and vehicles in fresh uniforms and paint. I always gunked mine up a bit. Some guys in soft caps or different netting for their helmets or a mix of newish and well-worn unfiforms. (Sculpting British para berets out of para helmets on 1/72 scale figures was a specialty of mine.) Soviet tanks with slogans that had a bit of paint running off the letters. Turning 1x1 bases for the figs in micro-dioramas. This platoon slogging through urban rubble. Another stalking through woodland deadfall. Yet another sweeping a scrubby field with some tall grass.
A friend did much the same. But his trick was to buy already-assembled and painted figures and vehicles (to spare himself that effort) that were super spiffy. Then, as he put it, I give em the globby-globby. Which meant hitting everything with a drybrush of mud-colored paint in various shades. And that bit made em realand his own.