When I painted my units, I had issues with Britain, I originally made 2 schemes, then decided I only wanted the tan, not green… On my painting, I used a combo of lacquer Enamel and acrylic, it was at the enamel stage, but I soaked them in paint thinner (in all preparation to consider them toast and order new units)… but they came clean, they soaked for 10 min or so, and I used my tooth brush (yes mine lol, bristle’s turned green, and yes, I still use it, the green faded away HAHA) to scrub away the paint film.
