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Old 13 October 2002, 12:50   #1
Country: UK - England
Town: Salisbury
Length: 5m +
Join Date: Dec 2001
Posts: 459
Removing light white barnacle marks

Any thoughts on best way to remove light white barnacle marks off a gell coated glass hull ? Caused by the boat sitting in sea water for a few weeks.

My initial thoughts are a very sharp razor / scraper carefully trying to remove without scraping hull, is this wise ?

Any better thoughts, eg proffesional high pressure water hose ( personally I dont think this would work )


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Old 13 October 2002, 14:44   #2
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Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,837
I remember watching one of Ospreys staff remove a moulding burr caused by using a two piece mould with a spoke shave. After polishing you couldn't see a mark, however he had been working in GRP for many years.

High pressure water just removes the tops, leaving the small round foot behind, although its good for the weed and slim. Think the barnacles actually secrete a sort of cement to fix themselves on rocks or a boat.

How about jewellers rouge, its like "t cut" but made of a diamond paste. Alternatively two coats of antifouling and dont' worry about the problem again.

Pete (not the one with the speed boat)

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Old 14 October 2002, 13:49   #3
Country: UK - England
Town: Salisbury
Length: 5m +
Join Date: Dec 2001
Posts: 459
cheers pete

thanks for comments

any body else got any cunning plan to remove this white light cementy stuff ???

thoughts appreciated
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Old 14 October 2002, 17:39   #4
Country: UK - England
Town: Great Harwood, Lancs
Boat name: Tigger II
Make: Bombardier Aerodeck
Length: 3m +
Engine: Tohatsu 25HP
Join Date: Jul 2001
Posts: 626
Hi folks

A block of wood works quite well and does not scratch the hull.
Use the square edge to scrape them off.

We followed this up with the green pan scrubs and this seamed to mode them OK.

We did find it better if they was left to dry out for a while though.

The other thought and I dont know if it would work is some from of chemical remover. I belive they are maily calcium, mayb e a week acid like vinigar? any Chemists on Ribnet able to comment.

Eitherway they are sods to move

Regards Gary
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