Re: can 'I' fix this prop?
I've filed props that looked worse than that back into shape. Same WOT RPM and top speed as before, and no noticeable vibrations. The important parameters are the leading edge profile (should be like an airplane wing) and balance. Find any undamaged sections of the leading edges and try to replicate the profile when you file the dings out. Small, slightly bent areas can be dealt with using a hammer and block of wood. Try your best to make each blade the same size and shape, even if it means removing more material than necessary from less damaged blades. When you test it, watch carefully for increased vibration and check WOT RPM and top speed. Any vibration or significantly increased slip would suggest relegating this prop to a spare and buying a new one.
A prop shop can make it like new, but it's not worth it if it's going to cost the same or more than new.