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Old 09-04-2017, 03:18   #196
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Re: Barnacle removal without scraping

Greetings and welcome aboard the CF, hock.
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Old 17-11-2019, 14:16   #197
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Re: Barnacle removal without scraping

On topic:
Answer: Yes.


-You have someone else scrape them; and then grind them to finish the job. Otherwise sand/soda/shell blasting.
Some of the most important to remove barnies, like around your swim gear and through-hulls, are mechanically wedged into place as well as cemented on. They will not come off with some magic sonic doo-dad. If someone believes that is true, then they probably also order charts with parallel longitude lines.


Shell gets cemented on, in some cases, with better adhesive strength than your gel-coat does to a secondary bond of the fiberglass layup of your hull.


In any case, scraping barnies is a tiny tiny little cleaning chore. It just doesn't take that long. Scraper on a stick, wide razor scraper for the waterline to get off the scum, and a hefty banger hand scraper for the rudder roots and other swim gear. Just do it.
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Old 14-07-2020, 14:52   #198
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Re: Barnacle removal without scraping

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Originally Posted by fisherman.ben View Post
or you can leave the boat in the water and use a pressure washer (yes, they do still work under water, I do it once a year on the commercial fishing boat I work on) use a 35 tip, close the sea cocks, put on the dive gear, keep it away from strainers and about a foot (or so) away from the boat and go to it. (just don't do it in the harbor, people don't seem to mind if you scrub the bottom with a carpet or brush, but some of them don't like the noise of the pressure washer.)
Iím going to remember this. Thanks
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Old 14-07-2020, 17:06   #199
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Re: Barnacle removal without scraping

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Iím going to remember this. Thanks
Take it from somebody who earns his living cleaning boat bottoms- if you care about your anti fouling paint; you will never aim a pressure washer at a painted surface.
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Old 14-07-2020, 17:45   #200
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Re: Barnacle removal without scraping

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Take it from somebody who earns his living cleaning boat bottoms- if you care about your anti fouling paint; you will never aim a pressure washer at a painted surface.
What tools do you use?
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Old 14-07-2020, 19:07   #201
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Re: Barnacle removal without scraping

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What tools do you use?
https://youtu.be/Y_Q3S-r0iGs
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Old 14-07-2020, 19:21   #202
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Re: Barnacle removal without scraping

Cool! I wish I had it when I was cleaning my boat in Florida. (I used my two children instead.)
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Old 23-07-2020, 01:18   #203
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Re: Barnacle removal without scraping

You need a calcium remover, or a mild acid such as oxalic or phosphoric acid, found in hull cleaners.
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