There isn't really Joe.Adding stain to clear glass just isn't going to give any satisfactory results like staining the actual wood veneers would have.Spraying something over the clear glass,even something translucent,will just look like you sprayed something over clear glass.I have a bow like that too.I just put black masking tape on the back glass,for hunting out of an antelope blind.After season,it peels right off.The rest of the time,I use it in situations like field edges,where the light tan blends in.The reason,I believe,that you got no good results is that there just isn't a good way.The covering methods,temporary or otherwise,are about the only good options.