I shot the underside with light blue.The usual recommendation is Hu 65 which is also RLM65 Hellblau. I put a coat on and it was way too aqua. So i mixed some 65 with "Duck Egg Blue", shot that on. Then I came back with pure DEB and highlighted the middle of the biggest panels. I'm pleased with the results. Next, start the topside with Hu 121 tan.