Help w/ Masking on A/C

Thanks for the tips. I'll post images shortly.

I assume you are painting the black areas last as they are the darkest colour. If I was attempting this I think I would lay overlapping pieces of thin tape (Tamiya 6mm) across the nose (i.e at 90' to the longitudinal axis) and mark the tape on one side only with the colour division line you hope to achieve. I would then remove the tape to my cutting mat and duplicate the pattern for the second side either by measuring or using tracing paper. You then have two choices - either cut the central black area, reapply to the model and use as a quide for the thin tape that you have already tried or remove the black area and apply the hopefully symmetrical outer masks. This sounds more complicated than I had hoped for but I am sure with patience would work. I have used this technique myself with good success just not for this exact application. Because the mask is not a single piece it pays to burnish well and paint from "behind the edge" rather than towards the mask edge. Let us know how you get on.

Find what you think is center, measure equidistant from there on both sides, and at several points. Connect the dots with tape.