[Rhodes22-list] Re: CB trunk, bottom paint

[Lou Rosenberg]

  Roger,
  I  just bought one of those alcohol heaters by Origo, and thought 
about doing the tent thing, but I dont want to be the first Rhodie to 
put my boat into orbit so I most likely wait until spring to do the 
painting:)
  thanks
  Lou

>  Lou,
>
>50 deg F is really pushing the low edge of the envelope for any air cured
>paint.  Is there anyway you could set up a tent around the centerboard well
>& heat the interior with some sort of space heater?  Note: beware the
>build-up of flammable vapors in any enclosed space with a space heater!
>
>Roger Pihlaja
>S/V Dynamic Equilibrium
>
>----- Original Message -----
>From: "Lou Rosenberg" <lsr3 at MAIL.nyu.edu>
>To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
>Sent: Thursday, December 02, 2004 5:32 PM
>Subject: Re: [Rhodes22-list] Re: CB trunk, bottom paint
>
>
>>  Roger, Richard,
>>    I am very anxious to finish this project before the weather degrades
>>  to cold nasty days, and wanted your opinions on pushing the envelope
>>  for using  a bottom paint when the ambient temp is around 50F??
>>    I will of course read the instruction on  Pettit's Trinidad before I
>>  buy if I can find it in a store in NYC,  I have the PS 2003 issue
>>  which listed and evaluated all the bottom paints and will see what I
>>  can find. My only other choice after I am assured my board will not
>>  jam again, is to put it back together without using all the bolts and
>>  paint in the spring.
>>    any ideas?
>>    Lou
>>
>>
>>  >Richard,
>>  >
>>  >High CuO content bottom paints with a hard epoxy binder function by
>slowly
>>  >leaching the copper to the surface.  Since the CuO is already in an
>oxidized
>>  >state and the epoxy binder is inert to oxygen at room temperature, air
>>  >exposure should have no effect upon these properties.  Pettit Trinidad
>was
>>  >developed for use in extreme fouling tropical conditions, i.e. like the
>>  >Caribbean Sea where the island of Trinidad is located.  Since sea water
>does
>>  >not have a very high cuprous ion content, there should be no suppression
>of
>>  >the biocide solubility.  I don't think Lou should use one of the ablative
>or
>>  >sloughing bottom paints inside his centerboard trunk because of the close
>>  >clearances and potential for mechanical and abrasive wear.  I suggested
>>  >Petit Trinidad because it dries to a very hard slippery finish and should
>>  >last as long as anything else currently on the market.  Naturally, you
>would
>>  >also want to coat the centerboard with bottom paint & I would think
>Pettit
>>  >Trinidad would be a good choice here as well.  With so much CuO around on
>>  >both the centerboard trunk & the centerboard, I don't think marine growth
>>  >will have much of a chance to get started.  But, your point regarding
>>  >raising & lowering the centerboard a couple of times per week is well
>taken
>>  >& would be cheap insurance.
>>  >
>>  >Roger Pihlaja
>>  >S/V Dynamic Equilibrium
>>  >
>>  >----- Original Message -----
>>  >From: "Richard Smith" <sailnut at worldnet.att.net>
>>  >To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
>>  >Sent: Wednesday, December 01, 2004 3:11 PM
>>  >Subject: Re: [Rhodes22-list] Re: CB trunk, bottom paint
>>  >
>>  >
>>  >>  < The high CuO
>>  >>  > >content should keep the fouling at bay for years inside a
>centerboard
>>  >>  trunk.>
>>  >>
>>  >>  I don't think this will work in salt water!  Once exposed to the air
>these
>>  >>  seasonal coatings lose much or all of their antifouling properties.
>It's
>>  >>  possible to revive them (slightly) by sanding.  Difficult to sand the
>>  >>  interior of the trunk though.
>>  >>
>>  >>  The issue of centerboard trunk fouling (in boats always in the water)
>has
>>  >
>>  >>  never been successfully addressed.  I think the best approach is to
>paint
>>  >>  the board itself with a quality antifouling compound and lower and
>raise
>>  >it
>>  >>  a couple of times every week.  This will go along ways towards
>eliminating
>>  >>  marine fouling in the trunk.  By following this schedule my boat had
>>  >always
>  > >>  had very little hard growth  in this area.
>>  >>
>>  >>  Richard Smith
>>  >>
>>  >>
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>>  >>
>>  >
>>  >
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>
>
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