Today I dropped of a couple of Michigan bronze 32X32 Props in to be checked. One of them had cracks on all four blades and he said that the other one was rotten. I've never even heard of rotten bronze! Anybody know what he is talking about? Can cracks be repaired? These were spare props that came on my recently purchased Navigator, so I thought to get them tuned up and stored in my garage. Maybe I have a couple hundred pounds of scrap!