Bottom Paint

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Larry Hughes

I now have a lift for my '79 O'Day. It sails in Tampa Bay. I can lift it and pressure wash the bottom every time it is sailed. The bottom has some bad spots that need touching up. I don't know what kind of paint is on it now. It doesn't seem that I need the bottom paint with the poison additives. Can anyone recommend a plain paint for this purpose?
 
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Denny P.

two part epoxy

If you stow your blo-bote on davits or a lift you no longer need bottom paint unless you are going to leave your bote in the water for an extended period of time. I would use a good two part epoxy paint after grinding off ALL of the old bottom paint. Making sure that the hull, below the water line is faired nice and smooth...All the best..Denny P.
 
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R.W.Landau

Think of the future.

The 2 part paint is not meant to be submerged for extended periods of time. If you sell your boat the new buyer would have to remove this paint before applying new bottom paint and would probably negotiate your price because of that. If you are going to spend the money to have the bottom done put to towards the resale of your boat. r.w.landau
 
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R.W.Landau

Larry and Denny,

Larry, You have not told us which O'Day you own. I am assuming a 22 or 25. Denny, I would not wave credentials. Your argument has many holes. Larry, If you are doing the work, or if you have it done, You will need to remove all the existing paint to apply the two part epoxy finish that Denny has suggested. The manufactures recommend that it be applied professionally. You are now at $1500 to $2000 to have professionally done. I am assuming this is 1/3 the price of the boat. There is no two part epoxy paint made to be below the waterline, that I know of. Should you sell the boat, the bottom would have to be taken all the way down,removing the two part epoxy,to receive new antifouling paint, unless you sold your lift with the boat. The removal of the epoxy paint and the recoat of antifouling would be about $1500. If you have your hull professionally antifouled you may pay $500 to $1000 at the worst case. This would be sanding the the existing paint to an acceptable surface then applying antifouling paint. Denny, a smooth bottom is not as fast as a slightly textured finish. The friction is greater with a smooth hull than a slightly textured hull. The friction is less "water to water" than "water to hull". The slight imperfections hold/ slows water , which continues to roll aft , and the water is sliding on water. Comparing it to apparent wind; as the boat moves forward, the wind speed increases by the speed of the boat. As the boat passes through the water, the water rolls back from bow to stern, where a smooth finish has full surface friction. Denny, Though you are a marine surveyor, please remember that advice can cost people alot of money. Your job is to make sure a boat is sound. If you survey a boat with antifoul over topside epoxy and say nothing, you would be wrong.In time the epoxy paint would peel taking the antifouling with it. Denny, Please understand this is not a war. I feel this is one area you need to study more. If you are in training, please print this string and take it to your trainer. Ask him for his opinion before you respond back. I have been proven wrong before and loudly admitted it so that someone here would not make a mistake. Best to both of you r.w.landau
 
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Denny P.

Viewpoints

I have expressed my viewpoint on the information given, I believe that is what a forum is all about. It gets the mind working in many directions so that, when a person is better informed on a subject with as many viewpoints as possible under their belt they can form a learned opinion. I don't get militant regarding my opinions, nor am I set so far in my ways as to get offended when someone presents an opinion which is 360 degrees out from mine. I also stated that I would not like to have to investigate a hull that is covered with twenty coats of bottom paint. That was a statement of preference. Not waving my 35 years of experience in the boating industry. Most surveyors wont even examine or gurantee the results of a survey which has been conducted on a hull that has numerous layers of bottom paint plied on like pancake batter. I like any normal lover of the sailing sport enjoy a spirited discussion and many opinions of sailors and I often sit dockside listening to Olde salts as they pro offer their testimonys of the good olde days. Besides Riverview is about ten munutes from my residence and I would love to see the boat in question and discuss the problem first hand with the original writer of the query. All the best....Denny P.
 
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Doug T.

Confusion

I think you guys are confusing two different products: two-part topsides paint (R.W.) vs. epoxy barrier coat "paint" (Denny). Yes, the two-part topsides paint is recommended for professional application and is NOT intended for use below the waterline. (You CAN put them on yourself, but getting a really good finish is tricky.) The epoxy barrier coat (like Interlux 2000E) IS intended for use below the water line. That's its sole purpose: to provide a barrier to water intrusion. Most people that apply epoxy barrier coats ALSO apply regular bottom paint (hard or ablative), but I haven't heard that it's really required. If your boat is out of the water most of the time and you want a bottom paint that's intended for performance, try Interlux VC Performance Epoxy. It has Teflon in it.
 
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Denny P.

yes it is confusing

Don't ya see I never mentioned using topside paint below the waterline. The keyword that the original question stated was that he was going to pressure wash the boat after each use, lets see, the speed of the water from the pressure washer, maybe 150 M.P.H. plus the abrasive quality of the hardness of the water,,HUMM. an ablative paint would last, maybe two trips........enough said??
 
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R.W.Landau

I agree

I love the water. Denny, Thanks for your discussion on this. I was just assuming that the 2 part epoxy was a top sides paint because I do not know of a 2 part epoxy bottom paint. As far as the two part epoxy barrier coat, it would have to be covered if the boat is kept on a lift. Most epoxy barrier coats are not UV stable. Another option is to remove the paint and leave it bare. It may not look pretty after removing the paint.VC 17m would be a good paint to use.It can be left out of the water with no ill effects on the paint. Thanks Denny and Doug for your alternate input. Good sailing r.w.landau
 
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Doug T.

Epoxy

All epoxy products come in two parts. There's always a resin (thin or thick, with pigment or without, with other additives or without) and a catalyst. Good point about the UV characteristics of the barrier coat epoxies. Also, they don't have pigment, so they are basically see-through.
 
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mark gullickson

epoxy tar

Epoxy tar, such as VC-TAR, now sold by INTERLUX, is an option. I put it on my boat myself, and it has a good reputation for the most part. If someone has experience to share with this system, sure would love to hear about it. I am planning on a new bottom for the boat I just bought in the Mobile Bay. Is there a preferred brand? How does it compare to the new INTERLUX expxy barrier coat?
 
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Larry Hughes

I am the original poster of this question that has created such a stir. Just to clarify. The paint looks good generally. There are a few places where barnacles were scraped off taking the paint with it. I am concerned with protecting the fiberglass from water intrusion. I have heard that this may be destructive. I am not concerned about the esthetics and would just as soon leave it as is if it is not a protection issue. Thanks again for the many responses.
 
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