I've been doing Termagators method on a CAP-21 I'm building. I used white Monokote as a base and transparent red and blue on a balsa sheeted surface. I found that the windex method works great, until it dries. After that, the edges start coming up, and bubbles form in the transparent colors. I found it impossible to lay the star field down using trim solvent. I was able to overcome this problem by using tranparent blue vinyl (with windex), and being very careful with the transparent red monokote and trim solvent; getting it started in the middle on a shaded area, then working out to the chord and tip following with a squegee.

The windex does indeed serve as a type of solvent with the monokote, as a film of the color will squegee out, but it isn't enough to stick it for good. And, like I mentioned earlier, air bubbles do form in the middle after the windex dries up. I'm not sure how he can do it without bubbles eventually forming.