the canvas size is 30x24 and is mounted on a wooden frame 1/2"x 1.3/4".
I left the painting alone for quite a while and now the the frame has warped at two corners ie if I put it on a flat floor it would not be flat ie two opposite corners would be raised off the floor.
suggestions please to alleviate the warpage?
I was thinking of putting a 1/4"x1/2" frame permanent around the sides and tacking it to the frame,would this pull the warpage back into place?