Originally Posted by macconews
Did you bottom barrier coat the boats before you put coppercoat on?
How do you maintain the Coppercoat yearly?
Sounds like you have no regrets. What waters do your boats live in?
English channel which is a fairly weedy environment. Annually it needs just a very gentle rubover with fine grade (400) wet and dry paper but it only really needs that if part of the boat has sat on the mud. If that happens, the copper turns from oxide to sulphide (green to black, and completely out of my depth
in chemistry here) which doesn't appear to be as effective. The black areas pick up barnacles
while the green areas don't.
This is hardly a scientific treatise as you'll appreciate but for the two boats I have done, it's been great and I don't ever want to go back to A/F unless racing
There is no need for a barrier coat as far as I am aware provided you key the area properly before applying the coppercoat. Obviously if painting on to an unsound surface nothing will stick. The makers are also very insistent about not using acetone as a cleaner prior to coppercoating, and you have to put on the coats as their schedule and temperature guidance suggests.
Check with the makers for best advice but in my experience it has worked well.