Hi Tweek! Good to see you found your way here
I always enjoyed the quality of your paintscheme's! Especially that tiger scheme must have tried your patience
When it comes to shading it looks like you are making a mistake a lot of people make. They draw shading as a one piece affair and it really isnt. One way to make them look better is to draw a large very soft highlight/shadow that extends further up the plane and then near the edge draw a less opaque shadow/highlight which is more tightly feathered. This gives a much better effect IMO
For another "Trick" check out my post here
ENAER T-35B Pillan - El Salvador - Page 2 - Military-Meshes.com I hope it helps
Again, you are on the right path but I think you could get a major boost from some very simple techniques
