Thanx much guys,
I have a Frank SanMarco longbow that I got from Frank 18 or 19 years ago. Still looks and shoots great but have noticed a lot of very fine horizontal stress lines on the belly, Looks like it is in the finish on both limbs. Does not appear to go into the glass. Very fine lines can barely feel them with a fingernail. Will try and get in touch with Frank first, but looking for other bow re finishers just in case. I am in Oregon so the Bow Doc is in my neck of the woods.
Oberon