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Old 08-17-2019, 08:01 AM   #1
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Bottom paint question

Was on the boat last week and anchored out in a nice spot with some super clear water. Decided to use the snuba to check out the bottom paint.

There were some very small barnacles at the waterline and some larger (pencil diameter maybe) that I knocked off with my wooden spoon looking tool. Not much slime or green moss stuff growing. The paint looked pretty good but when I knocked off the bigger barnacles the black bottom paint came off with them.

Since larger barnacles are growing does that mean my paint is getting depleted, or just that I need more frequent bottom cleaning? Itís been on there 2.5 years and is Petit Trinidad SR.

Also, since the boat is in the Bahamas Iíve heard I can get higher copper content paint there? Was thinking of letting the local place here do a bottom job maybe but have not checked the cost yet. Has anyone here used Abaco Yacht Services on Green Turtle Cay for bottom paint or other work?
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Old 08-17-2019, 08:10 AM   #2
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Well, I am not sure that higher copper content will really improve things. Bottom paint with lower copper content to meet US standards is formulated with other biocides that probably does as good a job. And you do want to protect the environment by using minimal copper, don't you?


2-1/2 years is pretty good for any bottom paint. If it is getting intolerable, then a quick haul, sanding and painting at the waterline and two feet below can probably pick up another year of service.


David
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Old 08-17-2019, 08:34 AM   #3
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Oh yes. Whoops. Forgot about the environmental concerns.

Is that normal for some paint to pop off with a barnacle? I have not a been a frequent diver on the bottom because the water is usually too gross/murky for me when not in the Bahamas, so I donít know what a diver normally encounters.
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Old 08-17-2019, 09:39 AM   #4
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Yes, bottom paint doesn't stick well to the underlying gel coat or barrier coat so it will often pull the paint off when you scrape barnacles off. Obviously it is better to get them off when they are small and maybe not stuck so well. I would usually scrape from the water line down a foot or so every other month to get all of the little critters off.

A windshield ice scraper works great for this. Doubt that you can find one in the Bahamas though .

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Old 08-17-2019, 11:50 AM   #5
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At 2-1/2 yrs, I don't think that bottom paint owes you anything. I've left paint on that long in the past, what you're describing is consistent with the length of time the paint's been on, IMO.
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Old 08-17-2019, 12:24 PM   #6
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Oh yes. Whoops. Forgot about the environmental concerns.
What "environmental concerns"? The copper-based anti fouling paint availiable in the U.S. is no different than the copper-based anti fouling paints you buy anywhere else in the world.

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Is that normal for some paint to pop off with a barnacle?
Having removed many, MANY barnacles from boat bottoms over the last 25 years as a professional hull cleaner, I can tell you that when you scrape a barnacle off of a painted surface, what is left is a very thin calcareous disc that is almost impossible to remove. Were you to actually be able to scrape that disc off or if the paint were already disbonded then yes, paint might come off with it. But typically no paint is removed when scraping barnacles.
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Old 08-17-2019, 07:52 PM   #7
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2.5 years U got your $$$ worth.


Time to paint
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Old 08-17-2019, 08:12 PM   #8
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Bottom paint question

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Having removed many, MANY barnacles from boat bottoms over the last 25 years as a professional hull cleaner, I can tell you that when you scrape a barnacle off of a painted surface, what is left is a very thin calcareous disc that is almost impossible to remove. Were you to actually be able to scrape that disc off or if the paint were already disbonded then yes, paint might come off with it. But typically no paint is removed when scraping barnacles.

Very interesting. After scraping the barnacles off I did not feel the paint to see if in fact paint came off. I just assumed the white spot under the barnacle was missing paint. Thanks.
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Old 08-17-2019, 08:21 PM   #9
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I’ve used Trinidad for years, IMO it’s the best in south Florida if I get 1.5 to 2.0 years I’m very happy, sometimes I repaint every year.
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Old 08-17-2019, 08:27 PM   #10
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As said by others you got excellent life. We have gotten 3 years but we got it by frequent bottom cleaning and never any scraping.
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Old 08-17-2019, 08:52 PM   #11
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When we bought our current boat it had been painted in 2014 with a 2 year bottom paint per the boatyard where it was stored. Every year I assume it will need painting but so far it still looks good. I want to paint it because it is now blue and I want to go to black but I cannot justify painting it just to change the color. However we donít have barnacles here.
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Old 08-17-2019, 08:56 PM   #12
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Dave. Do you know the name of the paint? Five years is fantastic.
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Old 08-17-2019, 08:58 PM   #13
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You know I hesitated before making that post because I knew that someone would ask that question. No I donít know the brand. I will try to find the work order and see if it is listed. I have the work orders for the prior 15 years from the PO.
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Old 08-17-2019, 09:03 PM   #14
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Dave. Do you know the name of the paint? Five years is fantastic.
Don't overlook Dave's location.
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Old 08-17-2019, 09:25 PM   #15
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Location is very important , yes.
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Old 08-17-2019, 09:26 PM   #16
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Ok, found the old work orders. They put on Blue Water Copper Pro SCX paint. I had never heard of this brand but so far it is working great.
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Old 08-17-2019, 09:28 PM   #17
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I googled it and found it at The Bottom Paint Store for $165 per gallon with free shipping. That is an awesome price for a paint that has lasted for 5 years so far. No affiliation just a happy owner that inherited the paint job.
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Old 08-17-2019, 09:30 PM   #18
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Don't overlook Dave's location.
Yes, but it was in the Chesapeake for the first 2 years. I am not an expert on the Chesapeake so I donít know how bad the fouling was there.
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Old 08-17-2019, 09:37 PM   #19
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Don't overlook Dave's location.

Exactly. Up here with 53 degree average water temps, paint seems to last forever with quarterly cleaning by a diver.
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Old 08-17-2019, 09:45 PM   #20
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Dave,

Ahoy. Any advice for bottom paint?

I am headed to Seaview West tomorrow for a Monday haul out. I have no idea what is on the boat now, but it was applied in summer 2017.

Thanks!

Jeff
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