i dont do glass , but i would imagine using some sandpaper , masking off the limb so you dont scratch it , and just press your thumb on the overlay , then pull the sandpaper . i cut long strips of sandpaper into about 1" wide x 12" long , and sort of do a primate belt sander...
you should wait for advice from a glasser , they might tell you im completely wrong...and i may be...
i love the accents and limbs. we are dying to see it all bolted together im sure.
-hov