What looks like a seam running the length of the back side has split slightly along most of the rudder. I retrieved it out of storage with the intent of sanding, filling, and re-glassing the back, then sanding and repainting. However, after reading some of the previous postings, and taking into consideration I have never worked with fiberglass before, do you think this is wise? This sounds like a common problem. What's the best solution, short of replacement. Thanks in advance for your response.