This is true. The problem is that it looks like absolute s-[cnsod] on a scale model. On fighters, the stripes were 18 inches wide. In 1/48 th scale, this is roughly 3/8th inch. Like Tex said, paint the area white and then tape off the white and spray the black. I tape off 3/8th inch on a ruler and use it as a rough guide. Then use thin strips of Tamiya tape which is flexible and tape as needed. I just did a work in progress thread P-51 C in the aircaft forum with full blown invasion stripes using this method. Here’s the link if you would like to see what I’m talking about (sometimes pictures are better).
http://cs.finescale.com/fsm/modeling_subjects/f/2/t/155955.aspx
Good Luck,
Joe