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10-30-2015, 06:09 AM
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#1
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Veteran Member
City: Outer Banks NC
Vessel Name: Adagio
Vessel Model: Island Gypsy 32
Join Date: Jul 2012
Posts: 58
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10yr Barnacle removal
My friends boat hasn't been hualed in probably 10+ yrs, I've never seen a boat so encrusted so to speak. Aside from needing a permit from the EPA to destroy an underwater eco-system what special steps should be taken when he hauls at our local yard ? I've heard spraying with muriatic acid helps in removal but I highly doubt a yard will let him do that as it hangs in the travel lift slings...Thanks
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10-30-2015, 06:17 AM
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#2
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,149
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Scraper on ta long handle for the paint areas...powe washer should get most...if it is a good one with the right tip.
Scraper on the underwater metals then acid if necessary...put a tarp under if marina balks.
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10-30-2015, 07:50 AM
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#3
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Senior Member
City: Great Lakes
Vessel Name: NONE
Vessel Model: NONE
Join Date: Jan 2013
Posts: 448
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Muratic Shouldn't be a problem since we dump it in our pools and go swimming in it. Acid Magic is a better choice, no fumes. There are several boats in my marina that have not left the dock or had the bottom scraped in easily a decade and every one of them does not seem to get any worse than mine gets in 4 months. On theirs it is clear that the growth has reached a certain point and stopped. Often wonder about that every time I walk by.
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10-30-2015, 08:21 AM
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#4
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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You could have a diver scrape it before you haul it. Less mess to deal with once you're on the hard.
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10-30-2015, 08:49 AM
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#5
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,307
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Like Bill said, scrape it in the water. The fish will have a feast and the yard will appreciate it.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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10-30-2015, 08:58 AM
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#6
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,785
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A diver can't use the long, heavy scraper that a yard can. It is no problem for the yard to handle the removed barnacles. They do it every day.
It took almost an hour with a heavy scraper like is used for roofing removal to get most of the accumulated barnacles after 4-5 years off of my buddy's boat. He then scraped the remaining by hand and used muriatic acid to try and get the barnacle base off. He was partially successful.
David
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10-30-2015, 02:16 PM
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#7
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Guru
City: kemah
Join Date: May 2015
Posts: 1,135
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10-30-2015, 04:30 PM
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#8
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TF Site Team
City: Brisbane
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 4,262
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Quote:
Originally Posted by djmarchand
A diver can't use the long, heavy scraper that a yard can. It is no problem for the yard to handle the removed barnacles. They do it every day.
It took almost an hour with a heavy scraper like is used for roofing removal to get most of the accumulated barnacles after 4-5 years off of my buddy's boat. He then scraped the remaining by hand and used muriatic acid to try and get the barnacle base off. He was partially successful.
David
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I have been told that it is crucial to get the barnacle base off. I used a sharp wood chisel to do it. Just pushing by hand, no hammers used! It worked quite well, but it is slow. Next time I think I'll use the chisel for a first pass (well, after pressure wash and scraper) and then try acid for the remaining bits of barnacle base. It might need another chisel or something afterwards, but I'm thinking the acid would loosen them a bit.
__________________
Brian
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10-30-2015, 05:26 PM
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#9
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Quote:
Originally Posted by Insequent
I have been told that it is crucial to get the barnacle base off. I used a sharp wood chisel to do it. Just pushing by hand, no hammers used! It worked quite well, but it is slow. Next time I think I'll use the chisel for a first pass (well, after pressure wash and scraper) and then try acid for the remaining bits of barnacle base. It might need another chisel or something afterwards, but I'm thinking the acid would loosen them a bit.
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Acid doesn't loosen them at all. But it will eat away the shell base left after you scrap away the main body.
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10-30-2015, 05:59 PM
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#10
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,329
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After 10 years, the least you can do is sing the barnacles "Happy Birthday" before turning them into fish food.
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BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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10-30-2015, 06:01 PM
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#11
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Moderator Emeritus
City: St. Marks, Florida
Vessel Name: Morgan
Vessel Model: Gulfstar 36
Join Date: Sep 2012
Posts: 3,673
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Quote:
Originally Posted by OBXSkipper
My friends boat hasn't been hauled in probably 10+ yrs, I've never seen a boat so encrusted so to speak.
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I'm still trying to figure this one out. Why? The boat must not have been abandoned, so it kind of boggles the mind as to why anyone would not have a bottom job, or at least a diver anyway, over a decade. Strange. Oh well. Not my business, I guess.
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John
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10-30-2015, 07:55 PM
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#12
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Guru
City: kemah
Join Date: May 2015
Posts: 1,135
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I had just the opposite experience. 8+ years sitting at the dock and pretty much just the prop the rudder the chines and the bottom edge of the keel had barnacles. The rest of the hull was completely clear.
old man next to me hasnt had his defever cleaned in over 5 years he said.
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10-30-2015, 11:04 PM
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#13
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Guru
City: Diberville Mississippi
Vessel Name: KnotDoneYet
Vessel Model: 1983 42' Present Sundeck
Join Date: Oct 2007
Posts: 2,450
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Needle scaler to the rescue. They work great on barnacles. Parks might let you use his...
1983 Present 42 Sundeck
Twin Lehman 135's
✌️
__________________
Steve Point Cadet/ Biloxi, Mississippi USA
*Present 42 twin 135 Lehmans
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10-31-2015, 05:43 AM
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#14
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
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Flat bladed hoe (looks like a big chisel on a long wood handle) works very well. Get the angle right and just slide it down the hull. I'm sure this won't be the first encrusted hull the travel lift has hauled.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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10-31-2015, 06:02 AM
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#15
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Guru
City: Under a boat, in a marina in the San Francisco Bay
Join Date: Mar 2012
Posts: 615
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Quote:
Originally Posted by djmarchand
A diver can't use the long, heavy scraper that a yard can.
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Sure they can.
Quote:
Originally Posted by djmarchand
It is no problem for the yard to handle the removed barnacles. They do it every day.
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I don't know about where the boat in question lives; but here in the Bay Area ( and maybe in all of California), excessively fouled boats will get a hefty surcharge from the yard as the yard must have the fouling growth barreled-up and shipped off as hazardous waste, which costs them a bundle. 'Course, it's OK to scrape it off in the water before the boat is hauled- that's no problem. Go figure.
__________________
Clean bottoms are FastBottoms!
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10-31-2015, 07:49 AM
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#16
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TF Site Team
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 5,663
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I had to deal with huge barnacle growth this spring, due to shifting to much healthier waters. I found that scraping while still immersed worked lots better than waiting for the power wash to be finished and then scraping. That even though I was swimming to do the former and standing to do the latter. Maybe the open, live barnacles don't hold on as tight?
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10-31-2015, 11:37 AM
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#17
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Guru
City: Sidney
Join Date: Feb 2015
Posts: 2,258
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Quote:
Originally Posted by koliver
I had to deal with huge barnacle growth this spring, due to shifting to much healthier waters.
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Hmmm, interesting.
From where to where?
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10-31-2015, 11:54 AM
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#18
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Veteran Member
City: Seward, AK
Vessel Model: Custom 45' Steel Trawler
Join Date: Sep 2013
Posts: 76
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Spray with chlorine bleach mixed 10% in water from a pump-up sprayer, then pressure wash and scrape. Apply on-and-off acid or muratic acid (vinegar also works) to dissolve any remaining barnacle shell bases while scraping them off. The longer you keep it wet after haul-out, the easier it is to remove. Let it dry just once and bio is much harder to get off the hull.
The bleach and acid applications just reduce the amount of elbow grease needed...good luck.
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10-31-2015, 12:03 PM
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#19
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TF Site Team
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 5,663
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Coal Harbour to Long Harbour
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10-31-2015, 12:21 PM
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#20
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Guru
City: Sidney
Join Date: Feb 2015
Posts: 2,258
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Quote:
Originally Posted by koliver
Coal Harbour to Long Harbour
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So, healthier water or more sun? Open moor vs boathouse?
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