[C320-list] How Often to Repaint Hull

[David Prudden]

The CSC is blue.....sorry about that!

Sent from my iPhone

> On Aug 19, 2019, at 8:47 PM, David Prudden <dprudden at comcast.net> wrote:
> 
> 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
>