I love the lizard green/yellow but not all Legnanos were painted that color. I have one that is “regular” green with the box striping and correct decals in place so VERY unlikely a respray.

A friend of mine is a Moto Guzzi nut and they employed layered methods like Legnanos on their older bikes for the color. There were some modernish Guzzis with a similar color that may have been a single layer application but I don’t have any knowledge of this.