Hello Steve,
In spring 2009, I copper coated Pegasus (325/37). She had built up almost ten coat years of antifoul and a good scrape back to gel coat seemed in order..... All I can say is that the 100% level of cleanliness needed for copper coat application proved to be very hard work and took two of us days and days! (Scraping and sanding!) The other issue, I discovered, was that to apply copper coat as prescribed, one needs very dry weather above 10 deg C day and night. So it's not an early spring job outdoors!
With respect to the steel and lead wing, coppercoat provide you with a primer. I fount this to be partially successful, but the front leading edge of the keel has already rubbed and washed away. I have decided to not the redo this and have cleaned any other crumbly bits on the leading edge away with a wire brush back to the steel.
However, my biggest fear was that the presence of copper on the keel might in some way electrically react with the stainless steel. This has not apparently been the case, but the keel does get a very close inspection each year now. There have been no issues with the lead wing as far as I can see.
With respect to how well the coppercoat has worked, we are now entering our 3rd season with it. Except for a few days each spring where she is lifted out to blast off, hull inspection, change anodes, check ram etc, the copper worked fantastically in the first year, but appears to have worked less well since. That's not to say, however, that fresh annual chemical antifloul on my neighbours boats has worked any better! This year seems to have been a bad weed year!
So I wouldn't describe coppercoat as a anti foul silver bullet, but a good brush round just below the waterline 2 or 3 times in the season seems to be effective!
Hope this is help?
Stuart
Pegasus 325/37