Small Scale Military Headquarters

i need a couple of british low viz roundels and all i have are the regular kind. I don't really feel like buying some. Is there a quick way to bleach the colour out of the decals? If i can they should end up pale blue and pinkish, which is the colour of low viz roundels.

Andrew,
You want to bleach the color out....fade the color..... If the decals are on the model try spraying them with
dull coat. Let the area dry, then use artists pastels, color you want...rubbed in with a Q-tip, spray and
let dry and then do the same with the second color.

If you choose this method its easy. Take a knife, razor blade what ever you have and scrape the pastel
until you have a small pile of the color needed. As mentioned above spray dull coat, let dry, apply pastel
with Q-tip, spray let dry. You'll want to spray thin coats each time......Ya don't want to end up with
a pitchers mound.
Try this technique on an index card or piece of sheet plastic. Now have at it!

Oh, there's always the old airbrush.... Kidding Andrew.... I use this technique often ( not for changing the color of
roundels but it should work) and I'm pleased with the results.
Good Luck.
Normandy.