I shot the green first then the yellow. Explains a lot. Regarding the decal problem there is a variation in the quality of decals due to age manufacture, etc. The process of getting the decal to lay down and conform to the surface is the issue. I'm seeing what to me are master builders and they say very little about the decals as if decals are a foregone conclusion. That's why I used this zero for an attempt at masking to get a feel for the problems. Some decals lay down with the application of a solution, (vinegar based?). I've got about a 50% rate of completion. The fails are primarily due to faulty decals or my lack of experience in recognizing when things are going wrong in other areas. If I paint wrong I can remove the paint. The decal has to be replaced.
If I were to make a top ten list of the things that I need to address to become a better modeler the #1 spot would be headed by the problem of the last model.