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post #7 of Old 04-21-2009 Thread Starter
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Originally Posted by Maine Sail View Post
Please for the sake of your wallet and prop DO NOT use a copper based bottom paint on a bronze prop especially if it is manganse bronze..

Do a search here on dezincification and you'll have a better understanding of why not..


If you look at the referenced Pettit website, they do state that proper prep is important. Plus I think the Vivid is a copper based paint that they show as superior to their zinc coating. My Max Prop has been on my boat for the last 24 years and for the last 10, I've used bottom paint after trying all sorts of remedies. I've had good luck with the interlux products, but the bottom paint that was given to me in a glass jar by a mechanic 10 years ago in a boat yard has been depleted and it's time for more except not sure as to what paint was used. I know it was an interlux product and a hard paint, but the fellow is no longer at the yard. Plus I'm pretty sure it was copper based, but I want to be certain that the paint people approve as to what is being done since in the past I can go 3 years between haul outs here on the middle Cheaspeake. Plus I'll dive no more than once a season on the bottom and only a few barnicles are ever on the prop with the paint intact. If the Pettit people are unresponsive, I'll go with vinyl-lux primewash, the primocon and the Trilux 33 all made by Interlux. I just checked the WM catalog and both the trilux and the vivid have around 24% cuprous Thiocyanate vs. the 70%cuprous oxide of the trinadad sr. Your point is well taken and just maybe that paint in the glass jar was not cuprous oxide, but whatever magic it contined, it sure worked. BTW...appreciate your many posts here on sailnet
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