Propeller Deterioration
The pitting you see on the prop is the result of Galvanic Activity. Since you do not have a zinc on the shaft, the prop is the sacrificial element. That is the concept behind the Indigo "No Barnacle" solution. The prop material has no zinc in it thus the pitting was very limited. The good news is that you had no barnacles.
To follow up on Dave's question, what was your WOT RPM and what boat speed did that yield. We have a least 20 Tartan 27s with our prop installed and no complaints.
Tom Stevens
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