[C320-list] How Often to Repaint Hull

[David Prudden]

I did the bottom of Teachers Pet similar to Wonky Dog. After soda blasting the bottom clear, I barrier coated with Interlux 2000E but instead of going right to the Micron CSC, I applied a coat of RED hard bottom paint, then 2+ coats of CSC. When I see hints of red, I know it’s time to repaint.

David Prudden
#787

Sent from my iPhone

> On Aug 19, 2019, at 8:36 PM, Troy Dunn <troutwarrior at gmail.com> wrote:
> 
> This might be like the what anchor is best question. (Fortress...all day
> long) I think it will be highly dependent on where you sail, how you sail,
> how you overwinter, what your paint preferences are, how environmentally
> concerned you are, where you think your money is best spent, how much free
> time you have, how well your bottom is prepped, how you apply the paint and
> what conditions are like that day, what you do for primer/barrier, how you
> tie coat, etc. etc. etc.
> 
> Obviously that’s a lot of variables and I'm positive I missed quite a few.
> 
> Wonky Dog is kept in fresh water and occasionally sailed into brackish or
> full salt water, the boat is kept in Havre De Grace at the top of the
> Chesapeake and sails as far as we can get with the time we have but never
> out of the bay, the salt line moves north during the summer.   When we
> bought the boat we had no information on what bottom prep was done
> originally, and I can absolutely assure you that if you do your homework
> you will hear some real horror stories about dealers in the northeast who
> did not properly bottom prep 320s and 350s prior to bottom painting brand
> new boats.  (Hint...there is mold release on the vinylester hull that was
> apparently not removed prior to applying the paint)  Our boat was in need
> of bottom paint and no barrier coat was originally applied save the rudder
> which had a barrier coat of some unknown white material.  Despite a lot of
> reccos to simply sand the existing bottom coat and recoat with another coat
> of ablative paint we opted to soda blast and then do the entire bottom
> job.  We used Interlux 2000E barrier coat and hot tied it to micron CSC and
> hot tied that to an additional coat of micron CSC, we hot tied a third coat
> of CSC to high velocity/turbulence areas at the bow, rudder, and wing
> keel.  The finished product is on it's third year.  We have not yet seen
> evidence of significant wear other than in areas that we have bumped the
> occasionally crab pot, mooring ball or flotsam/jetsam.  I suspect we will
> be touching up again in the spring and possible needing to sand and recoat
> after four years.   Our boat is on the hard from the second week in
> November thru March.
> 
> Your mileage will absolutely vary, but I am really glad we took the time to
> do this right and didn’t skimp on the paint.  Saving $200 on paint won't
> even begin to compensate my time if I have to do this every two years.
> Figure you will burn at least two solid weekends plus an hour or two in the
> slings before splashing to do this job.  Soda blasting is best left to a
> professional if you go that route.  Some people opt to go the sanding
> route, that did not appeal to me at all, add some more time if you decide
> to go down to gelcoat and start over by hand.
> 
> You can find pictures of our bottom job in the owners gallery.
> 
> Cheers
> 
> Troy
> 
> Hull #514