Hi Bus,
Good looking model.
I fancy myself as an air-head, pilot by profession, minor-sub-amature historian, here's my 2 cents:
The cowl is upside down.
Nakajima built the Rufe under licsence. I believe it should be Nakajima green.
Try to fill the gaps where the stabilizers fit into the fuselage. Gaps = drag = decreased performance.
Are the colors to bright? That depends. Rufes were used extensively in the Solomons. They suffered heavy attrition. Probably didn't last long enough to harshly weather. After mid-43 when they were relegated to second-echelon, they would last long enough for severe weathering.
Shading panel lines? I am not a fan of them. Most seem to exagerated compared to what I've seen on real planes--in real life and in archives.
Keep up the great work!