well heres my test piece of that pattern...on the inside grooves i went over them 3 times so i could get the center area to appear more raised...
the groove lines will be lighter than the rest...but if your going to dye or antique it...it should be fine...if your just going to oil it etc...not sure if theres a way to brunish those lines a bit before you border stamp them...i know i wouldn't have a steady enough hand to lets say...run some light stain down them without screwin something up hehe
i didn't have his other matching border stamp...anyways, is this pretty much what your lookin at?? also run the modeling tool after all stamped along all the
lines/edges etc...