[C320-list] Hull makeover

[DAVE Swanson]

Scott,

I quick note on protecting the prop.  I looked into Prospeed, but it seemed too expensive and the preparation for applying its multi-part application seemed too time consuming.  So we have been using a $20 can of Petit zinc paint and have been happy with it.  

We have kept our C320 in the warmer waters of San Diego Bay and now the colder waters of Puget Sound.  For protecting our fixed 3 blade propellor against fouling, here is what we have done and it was worked really well:

1.  Remove barnacles with pressure washing.
2.  Lightly hand sand with emery cloth and to a bright finish and use vinegar to clean.
3.  Paint propellor with Petit Prop Coat Barnacle Barrier Paint (about $20).  It is a zinc-rich primer type of paint.  I use 2 to 3 light coats on the propellor and the stainless steel propellor shaft.  Make sure to not paint over the zincs.
4.  Let the zinc-rich paint dry and coat the propellor with Lanocote.  The lanolin-based Lanocote is a tenacious anticorrossion paste.  They market a Prop & Bottom version of this product, but I just use the regular Lanocote.  The stuff is so sticky and tenacious - a little dap will do ya!

Both in the Bay and the Sound, the propellor has stayed free of barnacles and fouling.  When I haul the boat for bottom painting (about every 3 years) , the Lanocote is gone and the zinc primer has just about worn away as well.  We use Petit Trinidad antifouling bottom paint on the hull and have been very happy with it. 

Dave

David Swanson
S/V Emily Ann
2007 C320 MK II, No. 1107
Mukilteo, WA      




> On Aug 5, 2015, at 5:53 PM, Scott Thompson <surprise at thompson87.com> wrote:
> 
> I also have a Maryland boat that probably was not properly de-waxed when new. I am the second owner but I believe it was originally commissioned locally, and for the first few years of my ownership I had recurrent problems with paint flaking off in large patches. But I've never seen any sign of blisters. I finally had the bottom blasted down to gelcoat, with a barrier coat applied before a good bottom paint. I had it done again this year (after ten years) mostly because I use a hard paint and was concerned about build-up. I don't have a slip, so I haul out every winter, and apply one fresh coat every Spring, which is probably overkill, but which seems to work for me. Bottom prep is the one thing that I always pay someone else to do.
> 
> Now if I could just find something that worked well for the prop. I injured my shoulder last month and so the boat hasn't been moving much, and when I tried to motor it around last week I couldn't get up to full RPMs so I suspect a fouled prop. Again. When this happened last year I had to scrape it all off along with the expensive Propspeed by diving under the boat while on the mooring. I nicked my finger on some barnacles and caught a bacterial infection that spread up my arm leading eventually to surgery and months on antibiotics. So Propspeed isn't working for me.
> 
> Scott
> Surprise, #653
> 
> On 8/5/2015 5:03 PM, Allan S Field wrote:
>> Marco - If the boat was originally commissioned on the Chesapeake, there is
>> a better than even chance that the hull was not de-waxed at original
>> commissioning.  How do I know this?  Because for years, I had peeling paint
>> issues and finally was able to isolate the problem to lack of dealer prep
>> from a dealer on the Chesapeake.  I finally surrendered last August and had
>> the bottom soda blasted.  For the first time in 13 years, the paint rolled
>> on like it was supposed to do - no rolling on of one coat and pulling off of
>> the previous.  I will do a shorthaul in about 2 weeks to clean and repaint
>> the underwater metals plus change the zincs so will know more then as to how
>> the paint has held up for a year.  But just from the way it went on, I very
>> much doubt that I have any more issues.
>> 
>> As for blistering, these boats are supposed to be laid up with vinylester
>> resins which are bullet proof from blistering, so I have been told by Gerry
>> Douglas.  I leave my boat in the water year round and have never had one
>> blister.  That said, there was a run of 75-100 boats back in the 1990's that
>> did suffer from blistering.  Your boat may have been one of them but perhaps
>> someone else on this list knows the hull numbers that were impacted.  My
>> memory though is that they were in the 400 series.  If I am right, I am
>> perplexed to understand why you have had any blisters.  Could they have been
>> just paint bubbles?  I had a ton of them every year at haulout but again,
>> that's because the paint would not stick to the bottom.
>> 
>> I also have heard, but never fully confirmed, that Catalina made-good on
>> those affected hulls that did have blistering issues.  So you may want to
>> contact Catalina to determine if they know whether or not yours was impacted
>> or if it was corrected at their expense.  I do know of one boat on the
>> Chesapeake that was "fixed" at Catalina's expense but several years later,
>> needed to be "fixed" again at the owner's expense.  Based on an "n" of one,
>> it could be that the fixer of your boat was the same fixer of the one I know
>> about and it really wasn't fixed.
>> 
>> Hope this helps.
>> 
>> Allan S. Field
>> Sea Shadow - #808
>> Columbia, MD
>> 
>> -----Original Message-----
>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
>> Of Marko Jamnik
>> Sent: Wednesday, August 5, 2015 4:39 PM
>> To: C320-List at Catalina320.com
>> Subject: [C320-list] Hull makeover
>> 
>> Not a good time to be planning a fall, winter project, but here it goes.
>> 
>> Sail number 304 - 1995. I had purchased the boat in 2010 and have brought to
>> lake Ontario. Prior to that it had been in Baltimore and I have no idea how
>> many times it was hauled out for inspection, not many. I did a cosmetic fix,
>> sanding and drilling out three blisters the first season, there after
>> sanding and applying Micron. Tried to sand down the blue antifouling paint
>> that had been there, some success in areas and other location not. Over the
>> last five years I've had no more blisters and I'm finding that every year
>> more of the blue paint peels here and there exposing the inter protect
>> layer.
>> 
>> The challenge here is do I sand blast. peel the hull or any other method.
>> Is it worth while doing it myself or am going to regret the challenge. My
>> thought here is to have some do one of the above options and then I will do
>> the remainder, epoxy, interprotect, sanding and antifouling which should put
>> me on the door step of launch time.
>> 
>> 
>> Any advice would be much appreciated
>> 
>> Marko jamnik
>> Marquesas 304
>> Lake Ontario
>> 
>> Toronto/Mississauga area
>> 
>