Sure would, if the scratches are dead center on the keel and up far enough that a keel guard will cover it, then the fix doesn't need to be pretty just functional. Get some 5 ton, 2 part marine epoxy. Mix it well, let it sit until it gets workable and then fill the scratches. Use a piece of plastic shopping bag to cover it up and smooth it out. Once dried, the bag materila just peels right off. Then apply another coat if needed following the same steps. Once that one dries, sand the surface to match the contours of the hull. Doesn't need to be perfect remember, the keel guard will cover most. Then you install the keel guard. That I have heard is a little more difficult. I haven't done one myself. My tech says it is hard to manipulate and needs to be duct taped to hold until it sets up. Then your set. Good luck. But don't let water into that fiberglass or you'll never get it all out, and it will rot a soft spot into the hull which would be much more expensive to fix. Your current fix shold be under $200!
