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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.

Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

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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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