Wiping the wet coat, doesn't sound like a good idea to me....I would apply the lighter coat if this is your option, apply the darker shade, let it dry...and find some very fine grade sandpaper and lightly sand over the appropriate areas where you want to get the worn look....
I did this some time ago on a japanese aircraft to try it....applied the light coat then the Dark Green and carefully and lightly sanded some of the panels a little bit, you must be very careful not to over do it! See below...