I removed the logos with 300 grit sand paper and then painted black.
The limb tips painted with the Krylon Brass and then used acrylic black and brown to hand weather.
https://s20.postimg.org/bjugds02l/Limb_Detail.png
Used Hobby Lobby's Artificial Sinew "Natural" 228312 for the cord on the chock, then did a quick black acrylic wash. Most of the detail is lost in the bright sun.
The symbols were burned with a wood burner kit from Hobby Lobby.
https://s20.postimg.org/q1rnlrrdp/Stained_grip_w_chock_limbs_mounted_n_sinew.png
I eventually replaced the original knobs with stainless steel that I brass plated with a torch.
Edit: This is an old thread with great info but may want to give the Definitive Arrow thread a try.