Andrew,
Excellent work on the rivits...I just checked Youtube, but I haven't been able to find your DIY rivit video's yet
Both chassis' look great with a little paint on them. It's hard to judge the colours in the pictures, but I think the green looks pretty good, although maybe a little too light. I mixed and painted some colour samples according to Mike Starmers receipe a week or two ago and the green comes pretty close to yours, although a bit darker if I remember correctly.
Alex