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04-04-2016, 08:29
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#151
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Registered User
Join Date: Sep 2010
Posts: 874
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Will Ultrasonic Work on an Epoxy over Wood Boat?
Quote:
Originally Posted by Bob1201
I think you will be pleasantly surprised
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The manufacturers say the ultrasonic device is not suitable for "timber" boats, but will it work on epoxy over plywood boats?
Don't quite understand the installation, so I am wondering if the hard, epoxy coating (inside and out)l would make a difference.
Thanks,
G2L
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05-04-2016, 16:16
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#152
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Registered User
Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 7,141
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Re: Will Ultrasonic Work on an Epoxy over Wood Boat?
Quote:
Originally Posted by Gone2long
The manufacturers say the ultrasonic device is not suitable for "timber" boats, but will it work on epoxy over plywood boats?
Don't quite understand the installation, so I am wondering if the hard, epoxy coating (inside and out)l would make a difference.
Thanks,
G2L
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Think "hull ringing". Metal and solid fiberglass will work, whereas wood would absorb the ultrasonic energy.
__________________
The question is not, "Who will let me?"
The question is,"Who is going to stop me?"
Ayn Rand
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06-04-2016, 03:25
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#153
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Registered User
Join Date: Sep 2010
Posts: 874
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OK - Re: Will Ultrasonic Work on an Epoxy over Wood Boat?
Quote:
Originally Posted by senormechanico
Think "hull ringing". Metal and solid fiberglass will work, whereas wood would absorb the ultrasonic energy.
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Got it.
Thanks for the clarification.
G2L
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29-06-2016, 19:46
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#154
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Registered User
Join Date: Jun 2016
Location: Charleston S.C.
Boat: 1973 Irwin28
Posts: 3
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Re: Barnacle removal without scraping
I dive under my boat and use an ice scraper. Works great for all the soft stuff and I can pry off barnacles if needed..some are more stubborn than others.
Sent from my ALCATEL A564C using Cruisers Sailing Forum mobile app
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29-06-2016, 20:38
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#155
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Registered User
Join Date: Apr 2011
Posts: 2,492
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Re: Barnacle removal without scraping
Quote:
Originally Posted by Irwinsailor1973
I dive under my boat and use an ice scraper. Works great for all the soft stuff and I can pry off barnacles if needed..some are more stubborn than others.
Sent from my ALCATEL A564C using Cruisers Sailing Forum mobile app
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That should be good for the paint.
__________________
Bristol 31.1, SF Bay.
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29-06-2016, 20:44
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#156
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by MarkSF
That should be good for the paint.
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That's how every hull cleaner from South Carolina I've ever talked to does it. I'll never understand it.
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30-06-2016, 03:20
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#157
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Registered User
Join Date: Jul 2015
Location: Orential N.C.
Boat: 1981 Morgan OI 41
Posts: 162
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Re: Barnacle removal without scraping
Quote:
Originally Posted by Irwinsailor1973
I dive under my boat and use an ice scraper. Works great for all the soft stuff and I can pry off barnacles if needed..some are more stubborn than others.
Sent from my ALCATEL A564C using Cruisers Sailing Forum mobile app
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Quote:
Originally Posted by MarkSF
That should be good for the paint.
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Quote:
Originally Posted by fstbttms
That's how every hull cleaner from South Carolina I've ever talked to does it. I'll never understand it.
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How is it supposed to be done?
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30-06-2016, 06:53
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#158
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by Salty Mike
How is it supposed to be done?
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It's supposed to be done gently, with a pad or brush. If your anti fouling paint is so foul it requires a scraper to remove the growth, you have waited much too long to clean it.
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30-06-2016, 07:39
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#159
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by Salty Mike
How is it supposed to be done?
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30-06-2016, 20:01
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#160
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Registered User
Join Date: Jun 2016
Location: Charleston S.C.
Boat: 1973 Irwin28
Posts: 3
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Re: Barnacle removal without scraping
This boat is a rescue...it was abandoned...left to slowly die. I saved it and I am currently restoring her. She is 43 years old. She under my watch has not had a bottom job yet, so it is not an issue to pry a few barnacles off from time to time. I would never destroy any paint...but I do regularly dive and keep growth off. When in fact she is hauled out and cleaned and painted, she will not be receiving the ice scraper!
Sent from my ALCATEL A564C using Cruisers Sailing Forum mobile app
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01-07-2016, 03:43
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#161
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Registered User
Join Date: Jul 2015
Location: Orential N.C.
Boat: 1981 Morgan OI 41
Posts: 162
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Re: Barnacle removal without scraping
Quote:
Originally Posted by fstbttms
It's supposed to be done gently, with a pad or brush. If your anti fouling paint is so foul it requires a scraper to remove the growth, you have waited much too long to clean it.
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Thanks for the tips and the videos that will be very helpful in the near future, maybe this weekend if I get the old girl running.
Judging from the videos I'd say you have done this job a time or two in the past Guess I'll have to get over wanting to put the loose screws in my mouth like when I'm working on the motor...Putting it in the glove is a great tip.
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07-07-2016, 13:21
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#162
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Registered User
Join Date: Apr 2011
Location: Vancouver, BC
Boat: Niagara 35
Posts: 1,878
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Re: Barnacle removal without scraping
Quote:
Originally Posted by fstbttms
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Thanks for taking the time to put together the videos. They're great.
Sorry for the thread drift, but I had 2 questions about your shaft zinc install:
1) My zincs always fail at the screw attachments when there's still lots of zinc left in the body. I've been told that painting the screw contact area with nail polish will help this. Do you have experience with this?
2) I didn't see you whack the zincs with a hammer and re-tighten. You're the one who told me that I need to do that to flatten the little copper ball. Do only some shaft zincs require this?
Thanks in advance.
__________________
Chris
SailMentor.com - Become the Confident Skipper of Your Own Sailboat
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06-01-2017, 22:38
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#163
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Registered User
Join Date: Jul 2015
Posts: 313
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Re: Barnacle removal without scraping
Two to seven thousand people on a cruise ship, and this is what happens to their nastiness (and BTW - that ain't an oil slick)
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06-01-2017, 22:49
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#164
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,427
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Re: Barnacle removal without scraping
Quote:
Originally Posted by crabcake
Two to seven thousand people on a cruise ship, and this is what happens to their nastiness (and BTW - that ain't an oil slick)
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No, it ain't an oil slick. It's sand being kicked up by the bow and stern thrusters.
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06-01-2017, 23:04
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#165
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Registered User
Join Date: Jul 2015
Posts: 313
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Re: Barnacle removal without scraping
Quote:
Originally Posted by fstbttms
No, it ain't an oil slick. It's sand being kicked up by the bow and stern thrusters.
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OK, I'll bite - are you suggesting cruise ships don't discharge raw sewage into the oceans - and are you just saying your opinion of the photo is that the ship is just kicking up bottom from its thrusters?
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