Eduard has initiated a new line of masks that are rather unique in that they provide masking for the outside and inside of the canopy. While this is not a new solution it is the first time that pre-cut masks have been available. If you are like me you mask the outside and paint the inside color so that it shines through and call it a day. The drawback of this method is that while the correct color it is shiny.
In the past canopies have been rather thick and as such caused distortion so that if you masked from the inside it might not be perfectly aligned with the outside and vise versa. Modern kit canopies are significantly thinner than previous kits. So that opens up the possibilities of masking the inside.