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Old 01-03-2017, 02:24 PM   #1
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Almost time to bottom paint

Okey-dokey, it's almost time to bottom paint.

Tell me what is the best bottom paint around and can I mix a custom color?
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Old 01-03-2017, 03:37 PM   #2
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You can mix colors from the choices offered. Simply there are usually 3 to 8 colors offered for most bottom paints. You could certainly mix a quart of red and black for a different color. Don't think they tint bottom paint.

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Old 01-03-2017, 03:42 PM   #3
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A tip I picked up from someone was whatever color you choose pick a heavy contrasting one for the first coat. That way you can easily "see" when your bottom paint is getting thin.
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Old 01-03-2017, 04:02 PM   #4
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A tip I picked up from someone was whatever color you choose pick a heavy contrasting one for the first coat. That way you can easily "see" when your bottom paint is getting thin.
What he said. ^
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Old 01-03-2017, 04:12 PM   #5
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Ok, here is a stupid question. How many coats?
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Old 01-03-2017, 04:22 PM   #6
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If you are starting with a clean bottom (!!), then minimum 2 coats in different colors.
After that just refresh with an additional coat of the outer color paint annually or as needed. Ablative paints wear off faster if the boat travels further or you are aggressive about keeping the hull clean. You might get 2 years between painting. Not sure what works best in your area but Micron CSC was my choice. Avoid the cheap paints and non-ablatives (much harder to deal with in the long run - must be sanded before painting, whereas ablatives just need a good scrub)
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Old 01-03-2017, 04:22 PM   #7
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Usually 2, maybe 3 around the waterline if you have some paint left.
With color resolved,you need to be asking about:
hard or ablative
best brand/type for your area
what to use on running gear and/or
propspeed or similar, or not, and where to apply it
That should set the hounds running.
Do you know what`s there now? Not all paints go over other paints, an undercoat may be necessary if you don`t know/can`t find out.
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Old 01-03-2017, 05:37 PM   #8
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2 on the bottom 4 on the water line
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Old 01-03-2017, 07:07 PM   #9
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Ablative is good if your boat moves fast enough for the paint to shed. My 15 knot charter boat does; my 7 knot trawler doesn't. I'm going back with hard as it seems to last longer if you have a diver periodically cleaning the bottom. Depending on water salinity and temperature you may get 3+ years. Have had similar results with Propspeed. Works great on the running gear of the charter boat. Only worked on prop and shaft of the trawler as the skeg didn't have enough water flow (force) to blow the spat off.

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Old 01-03-2017, 07:48 PM   #10
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Very revealing post Ted.
I can plug that right into my experience.
Went w ablative. Lasted very long. Needed refinish. Very hard job. Scraped it all off. Never want to do that again.

I just assumed my boat at 6 knots would sluff off the paint in time. Didn't happen.
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Old 01-03-2017, 08:19 PM   #11
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Do not understand previous posts. Had no problem whatsoever with CSC at 7kt!!!
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Old 01-03-2017, 09:30 PM   #12
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Chrisjs,
I remember that stuff from about 12 years ago. I owned an Albin then and a guy w a 34' cruiser did a coat of CSC every year. But now the hauling out costs are so high more expensive harder stuff may be cost effective. I had pretty good service w $85 gal Petitt Sea Mate in Alaska. We had tidal grids that only cost $35 or were free. Every year was easy. Not so down here.
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Old 01-03-2017, 09:36 PM   #13
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Quote:
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After that just refresh with an additional coat of the outer color paint annually or as needed. Ablative paints wear off faster if the boat travels further or you are aggressive about keeping the hull clean. You might get 2 years between painting.
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Do not understand previous posts. Had no problem whatsoever with CSC at 7kt!!!
All bottom paints have chemicals in them to deter growth. So all bottom paints deter growth for quite a while. Ablatives are designed to shed exposing a fresh layer of the chemicals and shed any growth that is starting. If you need to add a coat annually, it sounds like its not revealing a fresh surface. If you don't have to scrub the ablative, my experience is that it will last 2+ seasons. A diver scrubbing the ablative definitely reduces the coating thickness which shortens its functional life. Trust me, I would much rather have ablative and Propspeed on my boat and not have to scrub the bottom.

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Old 01-03-2017, 09:51 PM   #14
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Ok, here is a stupid question. How many coats?
I'd put one color coat followed by 3-4 coats on the bottom and 4-6 coats on the sides if you're using ablative paint and you're going to have a diver scrub it on a regular basis.

With a hard paint I'd use less coats.
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Old 01-04-2017, 08:11 AM   #15
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Tell me what is the best bottom paint around...?
This professional hull cleaner only ever recommends two anti fouling paints; Pettit Trinidad (hard) and Interlux Micron 66 (hybrid ablative.) Two coats everywhere and a third at the waterline.
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Old 01-04-2017, 08:21 AM   #16
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Apparently, nobody on this forum has ever gone to a paint manufacturer's website. If you do, you will find a paint selector guide that asks you questions like Where do you boat? How fast does your boat run? Do you keep it in the water or out? etc.

Answer the questions and you'll have your paint. Of course, there are two major manufacturers so you still have to make a choice.

Before you actually buy the paint, talk to marina staff and professional divers in your area to see what they have to say.

For me, all the signs pointed to Pettit Trinidad SR 77. It's a hard paint and the only possible disadvantage is, it has to be kept wet. It's not supposed to be out of the water for more than 72 hours.
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Old 01-04-2017, 11:18 AM   #17
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Obviously I want to use the best. I don't mind spending more money on something that is going to last longer or be easier for the divers to clean.

I am not somebody who is penny wise and pound foolish. I personally like Pettit paints, but this is my first rodeo on bottom paint. Since this was an estate sale, I have no clue what is on there. It doesn't matter since I will be sanding it down and repairing some small blisters. I am going to try this myself with the help of someone who has become interested and my daughters with their husband/boyfriend. If I find we cannot do it without professional help, I'll suck it up and have the marina I pull out at do it.
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Old 01-04-2017, 11:38 AM   #18
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Hi Donna:
Make sure you wear protective clothing, goggles and good masks if sanding/painting the bottom paint. That stuff is really nasty!! Also, if you are sanding, be aware that there should be at least 2 coats of barrier paint under the first coat of anti-fouling paint. If you sand too much, you will remove this as well (assuming it is still intact). If you are really stripping down a crappy bottom (!!), then you might consider starting from scratch and doing 2 barrier coats, then the anti-fouling.
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Old 01-04-2017, 11:41 AM   #19
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If you are sanding all of the way down, apply a barrier coat before you repaint the bottom.


Edit: Didn't see your post Chris
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Old 01-04-2017, 12:54 PM   #20
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While barrier coats are great, if your boat didn't have any, and you have few if any blisters, then they are not mandatory.
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