Ok, so here is the paper way. First I measured the planes dimensions (wing span) on the instruction sheet and realized it was 6in on the paper and 12 in on the model, then I measured every mottle and doubled the length to draw on paper in which I cut out (2:1 ratio). I then placed all the cut pieces on the wing with some tac then sprayed the sand. I was very careful with this, as I didnt want paint going under the pieces. Then, I lightly sanded the mottles down into a uniform look. With this way, the mottles will come out accurately in size but leaves me the error of drawing a 'altered' shape and being ok..