if it is a glass laminated bow, the glass may be lifting and getting air under it. If not, then I guess it could be a finish but it must be a pretty sad finish to do that. One good finish is referred to as the "Massey finish." It is created by using 2 ton epoxy (about 20 mLs) and adding 80-100 mL of acetone...wipe it over the bow quickly (one or two swipes) with a clean rag (old t-shirt). If you let the acetone evaporate it will get really sticky so don't go over an area you already covered until after it has dried for SEVERAL hours. Do about 4 or 5 coats. Excellent epoxy finish.
