While I was working for GW, one Christmas they gave every staff member a big scale marine miniature, as seen below.
It is a great model, and I was lucky enough to get hold of a second one, from a staff member who didn't want theirs ( had no interest in marines, I know heresy ! LOL). I had the idea to paint it up as my chapter, but it needed some additions, the knife he was holding wouldn't fit in the scabbard, as it should be a gladius, this I got from the Inquisitor model of Artemis. Also I wanted to sculpt on my chapters symbols on the shoulder pads, I decided to make it a sergeant for a devastator squad, colour wise I used the same recipe that I normally use, but with the larger surface area allowed for a bit more detail easier.
Happy with how it turned out, and have another same scale that Forgeworld released to finish off as well, so until next time stay safe, and have fun !