I've got a boat for the first time and the prop on it looks a little beat up--edges dinged up where it looks like its hit several somethings. I imagine the prop is 10 years old (only because everything else is), so I am guessing that the dings are over 10 years of use. Is that something that can be repaired, or should I get a new one? In its current condition, it doesn't seem to have much of an effect on the boat, but then again, its all I know.