From: Jacksonville, FL, USA
It takes years but a lot depends upon the blade of the prop. The old Iwo Jima just had a regular commercial merchant vessel type prop so it was pitted within a few years. They replaced it in 1982 and again in 1985. More efficiently designed props on Burkes, and that, have much longer lives, but yes, it won't occur in a CMO scenario...
...not even one designed by me!
"Some people spend an entire lifetime wondering if they made a difference. The Marines don't have that problem."
PRESIDENT RONALD REAGAN, 1985
I was Navy, but Assigned TAD to the 24th MAU Hq in Beirut. By far the finest period of my service!