After building a couple RAF planes with hard edged camo, I noticed that after cutting my masks and painting the second color that there was a small "ridge"left on the demacation line.
The 1st plane was a Hurricane and I used Friskit to mask with, the 2nd was a Typhoon and I used parafilm. I used a fresh blade to cut the masks both times, and using what I "feel" to be just enough pressure to cut the mask. The ridge is not too large but still stands out, at least to me. Has this been a problem for anyone else and have you found a good way to work around it?