Here is situation now- all parts have coat of black surfacer and some later I will polish this surface. As well I build prototype, it have some specific features. First at all, it did not have bottom wing skids as series airplanes had. On hisg resolution scan of original also can be noted something like panel, this is where fabric is connected. Prototype also did not have blue line at fuselage bottom line, all was streaky camouflage over basic fabric.