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Catalina/Capri 25/250 Sailor's Forums

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Swing Keel Restore

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GeorgeWeisman
Deckhand

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USA
7 Posts

Initially Posted - 05/13/2010 : 18:22:13

I am going to have my swing keel for my C25 sand blasted so i can restore the pivot pin bushing and clean it up. The sandblaster suggested powder-coating the keel after blasting. I expressed concern, and he told me he would use a zinc chromate primer and then build up the powder coat. I'm a bit leary, but he said he has done it many times before. It would be nice to not have to get my hands dirty with epoxy and faring, but it sounds like a short cut. Any comments or advice?

George

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Dave5041
Former Mainsheet Editor

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USA
3758 Posts

Response Posted - 05/13/2010 : 19:19:32

I have been totally unimpressed with powdercoat exposed to weather. It is cheaper to apply than pain and, in my experience, less durable. Now that I've established my bias, I will say that I don't believe that it belongs on a keel. A marine epoxy based barrier coat is long lasting and easy to touch up. Stay with the traditional approach in this instance and you'll spend less money and time in the long run. There is a polyester/epoxy powder coat system, but I doubt that that is what he is offering.

Edited by - Dave5041 on 05/13/2010 19:31:00

OJ
Master Marine Consultant

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USA
4382 Posts

Response Posted - 05/14/2010 : 03:09:03

Yeah, I'm not sure how long powder coating has been around - but I'm not convinced it's the end all of protecting metal . . . especially for underwater applications.

You will always have some maintenance with a cast iron keel. Naturally, the better the seal the less the maintenance. 5 coats of Interlux 2000E is a good step towards that.

Remember metal begins to oxidize the moment you expose it to air!

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farrison
Navigator

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USA
166 Posts

Response Posted - 05/14/2010 : 09:24:31

Ditto on using Interprotect 2000E two part epoxy paint on your keel. It is designed for underwater use. That is what I am using on my new, balanced rudder. You can get on-line and goolgle it and read up on proper use an applications.

Paul

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GeorgeWeisman
Deckhand

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USA
7 Posts

Response Posted - 05/15/2010 : 04:15:08

That was my gut feeling. Thank you for the response, I think i'll take the traditional approach which can be touched up easily in the future. Happy sails!
G

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 05/18/2010 : 00:22:32

George,

Here's a link to how I refurbished the rusted surface of my Catalina 25 swing keel: [[url="http://sailincat.com/boating/C25_proj/C25_sk_refurb.htm"]Swing Keel Refurb Link[/url]]

Re: "It would be nice to not have to get my hands dirty with epoxy and faring,..."

Wear gloves

-- Leon Sisson

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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.