Copperpoxy is made and sold by Americam Marine
Coatings and I think they are located in Seattle
. If you can not find their phone
number let me know as I have it somewhere on my boat. Last price list I had has it for about $175 a gallon. It does not have the same coverage as a gallon of typical bottom paint
so you need more. I figured it would cost about twice as much, not a bad deal when you consider the lifespan.
You have to remove old bottom paint
but an epoxy
barrier coat or gel coat is okay. It is basicly an epoxy with a very heavy load of copper flakes so it also acts as a barrier coat. If for some reason you change your mind in the future you can apply standard bottom paints over it without having to remove it.