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 What happens if you don't get your paint wet?		  New Topic  Topic Locked
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Initially Posted - 10/03/2010 :  11:20:50  Show Profile  Visit delliottg's Homepage
OK, so time & responsibilities have conspired against us, so it's unlikely we'll actually splash the boat this year (yes I know it's fall). We finished painting the hull about a month ago. Pettit says on their instruction sheet for Trinidad SR that it has to be in the water by 60 days, but they don't say why. They're also not responding to my questions about it, and I haven't been able to find anything on the web about this.

Anyone got any ideas? We can potentially launch next weekend, but we've kind of resigned ourselves to keeping SL alongside the house for the winter so we can continue the never ending projects.

What if we kept the hull wet by spraying it down daily? I know that the copper needs to oxidize, and I can see it happening from the rain (which'll help us keep it wet, it's supposed to be a very wet winter).

Anyone have any insight?
David
C-250 Mainsheet Editor


Sirius Lepak
1997 C-250 WK TR #271 --Seattle area Port Captain --
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John Russell
Master Marine Consultant

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USA
3444 Posts
Response Posted - 10/03/2010 :  11:27:09  Show Profile
I can't imagine you'd lose anything if you kept your lawn sprinkler oscillating under the boat for a few days. You might get strange looks from the neighbors. I haven't a clue if that would be sufficient for the paint though.

I hope your inability to launch is a result of great success of your Treen business.
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Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts
Response Posted - 10/03/2010 :  12:16:42  Show Profile
Hard paints like Trinidad are just that way. Air oxidizes the cuprous oxide into copper carbonate, rendering it ineffective. (Cuprous oxide oxidizes in the water, too, but at a much slower rate.) Air <i>and</i> water together, as with rain, drying, spraying, drying, etc., might be <i>worse</i>, just as it is with iron and steel, although I'm speculating on that. With ferrous metals, air provides more oxygen than water, but water (including humidity) catalyzes the reaction with that oxygen.

Any boat that will be stored out of the water should use an ablative paint to (1) be effective after long-term storage, (2) eliminate buildup from annual overcoats and, (3) avoid the effort and mess of periodically stripping the bottom. The antifouling properties at the surface of ablative paint degrades, but that surface is constantly renewed as tiny a amount sloughs off.

An alternative for the racer is an ultra-thin paint like VC-17, which requires overcoating after every storage period but won't build up as much. Trinidad, however, is for boats that will stay in the water year-round.
Edited by - Stinkpotter on 10/03/2010 12:22:51
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 10/04/2010 :  04:22:44  Show Profile
Mine started pealing off. My power boat was moved from a slip to a trailer and the paint started pealing off after about 2 years.

It was a coat about a year old in the water. Most of it stayed on, just different spots.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.