I wouldn't use any oil finish on a picture frame without sealing with a top coat. The chances for it reacting with the picture in the frame is too high.
If they put a picture made from a digital file in the frame, no problem, they can always have one reprinted.
If they put a picture of their grandparents wedding and it's the only copy - disaster.
If they put a picture made from a digital file in the frame, no problem, they can always have one reprinted.
If they put a picture of their grandparents wedding and it's the only copy - disaster.
