M. Brindos
Oh yes! Glad you pulled this one out, Piper! :D
The answer to your question is no. They still had U.S. interior colors. The U.S. equivalents of the British paints were used for the camo (Dark Green, Flat Earth) but the inside was painted the same as any other A/C from the plants.
The trouble spots to look for are the landing gear knuckles (can be a bit of a pain and need a little putty) and the nose cut-outs should be installed before mating the fuse halves for best fit.
That should get you started with less trouble. The pit goes together easily so just keep an eye on the color call-outs, scrape all the flash out of the side wall inserts, and use a little micro sol to get the IP decal set into place. Mine lined up perfectly so you shouldn't have any problems with yours.
If you can get past those areas it all falls together. :)
Have fun!! Ill be keeping an eye out for ya! :D