The Airfix cabin has been a tad more difficult
The cabin floor worked well enough, though needed masked around the centre console
but the results were fine
however the walls, sprayed light grey and masked for the charcoal just like the matchbox suffered from paint removal when I took the masking off. So I resprayed the charcoal, masked that instead, and resprayed the light grey.
You will also notice the engine bay and tail have been painted, these surfaces are a light tan, so I have mixed a paler version of the Hemp used to spray the Victor.
The window surrounds have been sprayed on to the reverse of the transparencies
Which looks like it will give the desired effect.