Any of the applied finishes can be put on, some of which are quite dull. the surface could be abrasive blasted to create a dull matte finish or even paint can be made to adhere. I have used powder coating for this several times and it works admireably but I have a good friend who owns the shop,,sooooo. Personnaly I've never spooked game with the glare or reflection from a metal surface. Most animals attention is attracted to motion and color or reflection of light is very secondary.
