Don't ever watch your prop blades get overhauled. They take a big
grinder and grind the blades completely by eye. Huge amounts of
material is removed, and the more the better for the overhauler because
they can sell more blades when the thickness becomes a minimum.

Because you are not Pt.135, there is no mandatory overhaul period. But
what I recommend and do myself is to take the prop off and have it
inspected. Tell them that you want a minimum amount of light SANDING
done on the blades and have the hub inspected, repacked, resealed, and
new paint on the blades. This will cost just a fraction of an
"overhaul" and will do basically the same thing. It will also lengthen
the life of the blades. If it's 12 years since overhaul it would be a
good idea to do this now for your safety and peace of mind. Prop
failures are not pretty.
Karl
"curator" N185KG