What is wrong with your prop?
The 5 year corrosion inspection is pretty basic, unless the prop has not been removed in a very long time and the aircraft was outside alot. Unless the diameter is out of spec as per the TCDS, in which case you are hooped. Funny though if the prop was just overhauled that there would ba any issues.
I just did the 5 year corrosion inspection on mine and the TC delegate doing the import said that is all that is required for a fixed pitch prop.
If I can help, let me know.
John