When you try it, let us know how it works
While I'm familiar with, and use, the Windex method of adhering MonoKote, I haven't heard of trying it on a plastic fuselage. Depending on the type of plastic and surface finish, I'm curious if it will work considering it'll stick to MonoKote and other coverings using the same technique.
I'd say give it a shot on a small area, and take some pictures (success or failure) so we can see what actually happens.
Hogflyer