I tried to make the HG Hi-Gogg look like a Kampfer (just the coloring).
I chose blue for the body instead of the usual light blue. I think a more subdued blue would have been better.
When I first painted it, it turned out more vibrant than I expected, so I decided to add some weathering, which I hadn't planned on. I used Real Touch Marker Grey 3 and Weathering Master. I thought I'd made it quite dirty, but after taking photos, I feel like I could have made it even dirtier.
The internal frame is burnt iron color, the hand claws and missiles are metal black, and the details here and there are enamel

Hygogg (custom color version) | ロイ's Gunpla works