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Catalina 25 Specific Forum

Prepping for bottom paint

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mfasis
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Initially Posted - 03/21/2005 : 14:35:46

I just purchased my new boat after selling "Blew Bayou" and moving up to New York.

I am in the process of putting together my pre-launch to do list and the first thing that I am looking at is painting the bottom. This is not the first time that I have done a bottom job but it is the first time on a boat that has been well cared for. The last boat had been sitting in the water for several years and was severly fowled with barnacles. On this boat the bottom lookes so good I debated whether I needed to paint at all.

My question is as follows, the boat currently has INTERLUX Micron Extra Bottom Paint that is in pretty good shape. Do I need to sand before I apply more?

Mark Britton
Huntington, NY
'82 C25 FK/SR #3202
"Good News"

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dlucier
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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 03/21/2005 : 14:49:08

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by mfasis
 I just purchased my new boat after selling "Blew Bayou" and moving up to New York.

I am in the process of putting together my pre-launch to do list and the first thing that I am looking at is painting the bottom. This is not the first time that I have done a bottom job but it is the first time on a boat that has been well cared for. The last boat had been sitting in the water for several years and was severly fowled with barnacles. On this boat the bottom lookes so good I debated whether I needed to paint at all.

My question is as follows, the boat currently has INTERLUX Micron Extra Bottom Paint that is in pretty good shape. Do I need to sand before I apply more?
<hr height="1" noshade id="quote"></blockquote id="quote">

Congrat's on the new boat Mark.

According to the [url="http://www.yachtpaint.com/usa/default.asp"]Interlux[/url] website, only a light sanding is needed when [url="http://www.yachtpaint.com/USA/boat_painting_guide/pdf/antifouling/compat.pdf"]recoating with Micron Extra[/url].

From their website...

"Micron Extra retains it’s antifouling effectiveness when hauled and can be relaunched without repainting. The longevity of Micron Extra is related to the amount of paint applied."

Although I haven't used Micron Extra, if its a true multi-season paint and it's in good condition, then you might get another season out of it.

Edited by - dlucier on 03/21/2005 14:58:06

mfasis
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Response Posted - 03/21/2005 : 15:03:37

Don,

I guess that I'd rather paint now while the boat is out of the water than take a chance on the there not being enough paint already on. I should mention that I am going to moor the boat as I dont have a trailer. After sanding, what do you to clean with? Just soap and water?

Mark

Edited by - mfasis on 03/21/2005 15:04:51

dlucier
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Virgin Islands (United Kingdom)
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Response Posted - 03/21/2005 : 16:03:13

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by mfasis
 Don,

I guess that I'd rather paint now while the boat is out of the water than take a chance on the there not being enough paint already on. I should mention that I am going to moor the boat as I dont have a trailer. After sanding, what do you to clean with? Just soap and water?

Mark
<hr height="1" noshade id="quote"></blockquote id="quote">

Mark,

According to the [url="http://www.yachtpaint.com/Images/15_6221.pdf"]Instructions for Micron Extra[/url], for previously painted surfaces in good condition,...

"Remove all traces of loose paint and contamination by sanding the entire surface well with 80 grit wet-or-dry sandpaper: wipe surface clean with Interlux Special Thinner 216. Apply at least 2 coats of Micron Extra with Biolux, allowing proper dry times."

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mfasis
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Response Posted - 03/21/2005 : 16:05:40

Thanks Don. I guess I didnt look hard enough on the Interlux site.

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Leon Sisson
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USA
1893 Posts

Response Posted - 03/21/2005 : 21:44:15

Mark B,

I've used Micron Extra for years. It works great here in Florida saltwater. To prep for new coats, I just pressure wash, sand what's there smooth, rinse with water, and roll on more. Using "Interlux Special Thinner 216" probably wouldn't hurt, and of course it would help Interlux's profits. From what I've seen, the solvents in the new paint significantly soften the old paint, to the point that if I roll or brush the same spot too long, the old paint color starts to mix with the new. However I do use the recommended thinner, rather than guessing which generic solvent would be the most compatible.

Since Micron Extra is an ablative paint, you might consider applying a contrasting color. You can also mix different colors. That way, when what you've put on is about gone, you'll be able to see the old paint color, and know it's time to reapply. I get about a year of anti-fouling protection per (unthinned) coat. Roll on two coats, sail with a clean bottom for two years.

Oh, and a quick after thought about Interlux Micron Extra "Shark White" color. It looks light grey when it's fresh, but lightens to white after it's been submerged for a while.

-- Leon Sisson

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stampeder
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1608 Posts

Response Posted - 03/21/2005 : 23:08:20

This is very timely...I'm going to haul my boat out of the salt and truck it down the road about 400 miles and launch it into a lake for the summer. The boat is currently at a Navy Marina where there are excellent facilities for maintenance. The PO applied an ablative paint and based on an earlier thread, I'd decided to use Micro Extra - the question is - can I apply the paint, then drive 400 miles before launching - or should I prep the bottom, drive then paint shortly before launching into the lake.
The PO kept the bottom very nice and the last time I looked at the bottom, a light sanding and pressure wash would probably be all that's required prior to paint application.

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ClamBeach
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Response Posted - 03/21/2005 : 23:25:49

>"Using "Interlux Special Thinner 216" probably wouldn't hurt"

By all means get some of this... the paint will really thicken up on you in the pot.

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mfasis
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Response Posted - 03/22/2005 : 10:12:20

Thanks for all the advice. Weather allowing I will be painting this weekend.

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SJ
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USA
198 Posts

Response Posted - 03/22/2005 : 14:24:27

Mark,

Where is your boat??? I'm over on Creek Road in Huntington. Not sure if you know or not, but there is a 25 Fleet forming, "hopefully" this season in LIS. If you are interested shoot me an email..

Scott

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stampeder
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Response Posted - 03/22/2005 : 18:31:52

I'm on the left side of the map. LaBarca is moored on the southern tip of Vancouver Island.

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Gloss
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1916 Posts

Response Posted - 03/22/2005 : 19:05:54

Hey Stampeder,
I painted my old C22 with Micron Extra with Biolux.
If I remember correctly you can wait 30 days before launching, possibly it is a multi season paint for trailering, which was why I choose it. But check out the Interlux website. They have all kinds of information there, and should be able to answer your question.
For something like bottom paint you don't want to assume anything.

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mfasis
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Response Posted - 03/22/2005 : 20:17:51

Scott,

Right now my boat is on the hard. I will be mooring at Seymour's. I am very interested in particpating in any fleet activities.

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