Silvaire 1
Like a lot of people in this industry you are critical of a technology that you only have a passing knowlage of.
Most composite propellers are a wooden core with a carbon of glass re enforced plastic outer shell with a metal leading edge.
Damage to a metal prop is usually limited to blending the damage ( removal of metal) down to a manufactures limit.
Damage to composite blades is a more complicated issue but damage to a blade of a depth that would write off a metal prop is more than likely to be able to be repaired on a composite prop.
The composite Hartzell prop is a very different item being almost totaly carbon reenforced plastic, I am told with a metal spar. This is so new that I have no idea what the manufactures have mandated in the way of repaires but it looks like a very efficient areofoil and I am sure will out perform most other props.