A snippet from a posting on the OCC FB page:

"In the end, I came up with a superior solution. I bought the cheapest antifoul in the right colour I could find and added 500g copper powder to the liter. After the first season: not one barnacle, and no weed or anything else whatsoever."

Might be worth a try?

Peter Papageorgiou wrote:

Hello,

That's a lovely boat you have there.. I have one  the same albeit in bad condition, but fixable! I bought her as a project for a lowly sum, a couple of months ago, and hope to launch her next year. 

I live in Corfu, Greece, where I have owned a chandlery for the past 18 years and am now back to working on boats and skippering.

I have had a number of friends and clients who have used Copper/epoxy systems, with mixed results. Currently two of the bigger catamarans in the charter fleet I work for have coppercoat and I cant say I am impressed... a lot of green hairy stuff, and quite a lot of the harder white stuff. Also a mate of mine with a older Bavaria which is a sailtraining vessel so gets a lot of use, has had it for 5 years and has gone back to ablative antifouling. Having said that, there are also a number of people appy with it, I think it is important to get a good job done in the beggining (mixing the copper in continuously being important)

Personally i will be using an ablative/selfpolishing on my Corribee. I have had a lot of experience with them working fine for many of my customers, and I like the idea of minimum buildup of paint layers on the bottom.

There are many brands available here, Micron from International is one of the most commonly used, but there is also Seajet which is a bit more reasonably priced, and Nautix which is french and also very good/strong.

If you happen to pass by Corfu, get in touch. I am also the local HLR for the Cruising Association, and I will be nice to meet and exchange info on the Corribees...

Hi Peter

Your post sounds very interesting given that you are close by to Kefalonia and I would love to sail over (never say never depending how the season goes). Are there any particular mixes you recommend or is it generic for all waters?

Thanks again

Hello,

That's a lovely boat you have there.. I have one  the same albeit in bad condition, but fixable! I bought her as a project for a lowly sum, a couple of months ago, and hope to launch her next year. 

I live in Corfu, Greece, where I have owned a chandlery for the past 18 years and am now back to working on boats and skippering.

I have had a number of friends and clients who have used Copper/epoxy systems, with mixed results. Currently two of the bigger catamarans in the charter fleet I work for have coppercoat and I cant say I am impressed... a lot of green hairy stuff, and quite a lot of the harder white stuff. Also a mate of mine with a older Bavaria which is a sailtraining vessel so gets a lot of use, has had it for 5 years and has gone back to ablative antifouling. Having said that, there are also a number of people appy with it, I think it is important to get a good job done in the beggining (mixing the copper in continuously being important)

Personally i will be using an ablative/selfpolishing on my Corribee. I have had a lot of experience with them working fine for many of my customers, and I like the idea of minimum buildup of paint layers on the bottom.

There are many brands available here, Micron from International is one of the most commonly used, but there is also Seajet which is a bit more reasonably priced, and Nautix which is french and also very good/strong.

If you happen to pass by Corfu, get in touch. I am also the local HLR for the Cruising Association, and I will be nice to meet and exchange info on the Corribees...

Here in NZ, we have warm water and particularly vicious mollusc fouling, due to the shell fish farming releasing zillions of spat into the water.

As long as you keep moving (or moor in fresh water) the bottom stays clean.  Standard antifoulings foul up rapidly.  (When David sold Tystie, she was recently antifouled, but the new owner left her on a mooring for a couple of months.  He had to haul her and repaint her before he could sail her with any pleasure.)

I have chosen Coppercoat for my new build because I am going for shallow draught and because whatever I put on will need scrubbing regularly.  In NZ, they take a very dim view of clouds of ablative antifouling being scrubbed into the surrounding water.  I don't know what the rules are in Greece.

The nice man at Coppercoat NZ emphasised that it is essential to burnish it before launching and to do so every year or so to release more copper to the surface. 

Coppercoat is a water-based epoxy.  I tried to contact Synergy on a number of occasions and got no response.

I reckon that the NZ$1500 I've paid for my Coppercoat will pay for itself in 3 years of haul outs.

So what you need to consider is, local bye-laws around scrubbing, ie do they allow you to scrub off paint as well as growth, how much scrubbing you're prepared to do and how expensive it is to haul your boat out: a lot of yards have a minimum 10m price threshold.

I found that Coppercoat, as applied to Tystie, was suitable for cool waters, so long as I put her on the beach for a scrub very regularly, but failed fairly badly when I took her to warmer waters. Barnacles attach themselves very securely, and are the devil to scrape off once grown to any size. For a boat kept in a drying harbour, or kept on a trailer much of the time, it's better, because its hardness resists abrasion very well, but for a boat that's to be kept afloat during the summer in Greece, then hauled out, I'd tend to favour an annual coating of ablative antifouling.