Coppercoat cleaning?

[Nos4r2]

My mobo has been copper coated about 10 years ago
It's apparently never been rubbed d
own/burnished/abraded or whatever.

Unfortunately some rather tenacious marine worms managed to get a hold on the trim tabs on the stern and worked their way up onto the copper coat on the stern. This has provided a surface for weed to adhere to.
Can anyone recommend anything to get this concretion off so I can rub it down again to reactivate the coppercoat?

Or.... Am I going to have to redo the stern coppercoat? It's working very well on the rest of the hull still.

 

[Nos4r2]

This is what it looks like

 

[oldmanofthehills]

Just sand off the rubbish until copper come through. If you get through to gel coat its very simple to do redo or repair. Just order 250ml or 500ml of resin plus appropriate ammount of copper from Coppercoat. Not cheap, about £70 I recall but cheaper than most bit of the craft. Apply with roller 3 or 4 times until its all gone

Relax

 

[mainsail1]

Try pouring vinegar over the problem and then sand and re Coppercoat that bit.

 

[HughClayton]

The folks at Coppercoat are friendly and knowledgeable. They’re likely to say that the existing Coppercoat should be lightly burnished with #800 wet and dry paper and sell you a small repair kit for the area where the coating has been damaged. The repair is straightforward (RTFM!) and you’ll need a dry and warm day of the boat undercover.

My experience is that Coppercoat is great stuff but isn’t the maintenance free miracle that we’d all like!

 

[Elessar]

My mobo has been copper coated about 10 years ago
It's apparently never been rubbed d
own/burnished/abraded or whatever.

Unfortunately some rather tenacious marine worms managed to get a hold on the trim tabs on the stern and worked their way up onto the copper coat on the stern. This has provided a surface for weed to adhere to.
Can anyone recommend anything to get this concretion off so I can rub it down again to reactivate the coppercoat?

Or.... Am I going to have to redo the stern coppercoat? It's working very well on the rest of the hull still.

Brick cleaner and a scotchbrite pad.
Will need multiple applications.
When it’s apparently all gone, use more brick cleaner. If there is fizzing it isn’t all gone.
Use gloves and glasses.

 

[Nos4r2]

Brick cleaner and a scotchbrite pad.
Will need multiple applications.
When it’s apparently all gone, use more brick cleaner. If there is fizzing it isn’t all gone.
Use gloves and glasses.

Thanks.

Would oxalic acid do it do you think (I have loads) or am I going to have to buy the full on hydrochloric?

 

[Elessar]

Thanks.

Would oxalic acid do it do you think (I have loads) or am I going to have to buy the full on hydrochloric?

Never tried it but brick cleaner is cheap

 

[Halo]

That looks like a pretty thick accretion. I would use brick acid if I could trace where any run off would go and be use it’s not going to damage anything - especially anything metal such as bearings etc. I would also rinse off really well

 

[oldmanofthehills]

That looks like a pretty thick accretion. I would use brick acid if I could trace where any run off would go and be use it’s not going to damage anything - especially anything metal such as bearings etc. I would also rinse off really well

Hydrochloric acid is known also as Muriatic Acid especially on the Continent, is a primary ingredient in Brick Cleaner

 

[jimi]

Hydrochloric acid is known also as Muriatic Acid especially on the Continent, is a primary ingredient in Brick Cleaner

Any idea where brick cleaner can be purchased these days? Last time I tried to buy some they said the rules regarding sale had changed.

 

[oldmanofthehills]

Any idea where brick cleaner can be purchased these days? Last time I tried to buy some they said the rules regarding sale had changed.

Bostil Brick Cleaner from Tool Station. Bond It Brick Acid also available on line from Sealants Direct, and no doubt a few builders merchants.

There are various brands of Brick Cleaner but as only some contain hydrochloric acid, so one needs to read the technical spec