Has anyone experienced this? Wrinkles forming in the canvas while the filler is curing. After stretching the canvas and making sure it was stretched tight, I applied the filler (linseed oil/silicon base). This was last week; there were no gaps or wrinkles in the canvas. Today when checking, I noticed lots of wrinkles BUT only near the gunwales. The bottom of the canoe still has the canvas pulled tight. Is it possible that the filler is drying unevenly? The bottom of the canoe gets baked in the sun while the sides receive very little sunlight. I am hoping that this is simply a temporary problem and that when the filler on the sides of the canoe cures, the canvas will again be pulled tight. Any thoughts, comments and suggestions would be most welcome.