Took the boat out for the first time this weekend. Everything was well... When taking the boat out I saw the result of me being too close to shore with the boat. Not sure if I started it over rocks or if it was from being moored at the shoreline against rocks, but the prop had some damage. No chunks missing or cracks on it, but the edges of the prop look a little chewed like someone tried sawing through concrete with it. Not horribly bad but noticeable to me. Is this something that can be filed with a metal file to fix? or do I need a new prop ?