Michigan Mahahini. Paint

Designs for inboard or outboard power

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Michigan Mahahini. Paint

Postby footer » Mon May 14, 2018 8:27 am

I'm getting close to painting the bottom of my Malahini and I have a question:
Do I paint the color on the bottom before or after I put on the fiberglass?

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Bill Edmundson
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Re: Michigan Mahahini. Paint

Postby Bill Edmundson » Mon May 14, 2018 8:58 am

Fiberglass first! The paint protects the epoxy from marine growth and UV!

Bill
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BarnacleMike
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Re: Michigan Mahahini. Paint

Postby BarnacleMike » Tue May 15, 2018 3:39 am

Ditto! Definitely fiberglass it first.
-Michael

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Jimbob
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Re: Michigan Mahahini. Paint

Postby Jimbob » Tue May 15, 2018 10:22 am

Agree, fiberglass first.
I put on a coat of bottom paint primer next. (jamestown distributors), and then the bottom paint.
Jim
Jim Neeley
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Milhouse
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Re: Michigan Mahahini. Paint

Postby Milhouse » Tue May 15, 2018 6:36 pm

Do you actually use "bottom" paint (i.e. anti-fouling paint)? I hear that it is not required for trailered boats because the boat needs to be in the water for stuff to grow on it.
Jim
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vupilot
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Re: Michigan Mahahini. Paint

Postby vupilot » Tue May 15, 2018 7:36 pm

Yes, you can use topside paint if the boat will not spend more than a few days in the water at a time. If topside paint spends too many days submerged in the water it can start to bubble.

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Jimbob
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Re: Michigan Mahahini. Paint

Postby Jimbob » Tue May 15, 2018 8:22 pm

Attached is a picture of the bottom paint that I used. It says on the can that is an anti fouling paint. My boat will be a trailer boat. I used that bottom paint to match what was used on the original boats not for protection. My thought is, why not use bottom paint just in case you end up leaving the boat in the water for an extended time.
Jim
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Jim Neeley
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PeterG
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Re: Michigan Mahahini. Paint

Postby PeterG » Tue May 15, 2018 9:06 pm

The Pettit old Salem and similar hard racing bottom paints aren't really antifouling paints, weren't meant to be. They were formulated to give good protection to the hull in immersed service but are not designed to be bad tasting to organisms or ablative (wear away) like most antifouling paints. I plan on using polyurethane topside paint with the Pettit old Salem bottom paint for my Malahini which could spend weeks at a time in the lake.
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hoodman
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Re: Michigan Mahahini. Paint

Postby hoodman » Wed May 16, 2018 6:42 am

On the System Three WR-LPU can it says something about how months of constant immersion can lead to paint failure (I'm paraphrasing). It's what I used on the bottom of my hull and It hasn't seen water yet. However, my understanding of that wording is don't use WR-LPU and expect to leave it in the water all season. Mine will be a trailer queen unless I win the lottery and buy a lake house. But then I can afford to put in a boat lift too.

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Re: Michigan Mahahini. Paint

Postby JimmY » Fri May 18, 2018 9:23 am

+1 on what Matt says about WR-LPU. Used this on the bottom of my Squirt, but it only stays in the water for a day and it is on a lift or trailer otherwise.
-Jim
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Re: Michigan Mahahini. Paint

Postby footer » Mon May 21, 2018 3:56 am

Thanks for the info. I live on a lake and my boat will be in the water most of the time until I pick up a boat lift. So, getting a paint that will hold up is very important. I am almost ready to start fiber glassing, so I'm getting serious about some good paint.
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hoodman
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Re: Michigan Mahahini. Paint

Postby hoodman » Mon May 21, 2018 4:04 am

Wow nice job on the planking! Really clean seams!

I think you will want some kind of ablative bottom paint. There are a bunch to choose from. It will have to be refreshed every few years.


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