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Author Topic: First day out and a few bottom paint questions  (Read 853 times)

July 27, 2009, 10:44:32 PM
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sandgnat

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First day out and a few bottom paint questions
« on: July 27, 2009, 10:44:32 PM »
Finally got out this weekend after having to replace 2 axles on the trailer and having the seals replaced in the lower unit.



Questions: previous owners have bottom painted the boat. It is not stored in the water, but I think some preventative maintenance is needed.

How do I know what kind of paint to use?
How do I prepare the bottom for painting?
Can I spot paint?

I plan on using a pressure washer to clean the hull before getting started. Never bottom painted before. We just want to make sure the hull is being protected until we can do a complete rebuild in about a year or so.





Transom


Under transom
1970 22-2 Aquasport

July 28, 2009, 07:22:51 AM
Reply #1

RickK

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Re: First day out and a few bottom paint questions
« Reply #1 on: July 28, 2009, 07:22:51 AM »
Can defintiely tell it's a flatback sitting in the water :thumleft:
Looks to be the ablative type bottom paint - meant to wear away as the boat is used.  Some of it seems to get hard in spots, as you can see.  When you wash the boat rub your hand on the painted area and a little of it should come off on your hand.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

July 28, 2009, 12:16:39 PM
Reply #2

wingtime

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Re: First day out and a few bottom paint questions
« Reply #2 on: July 28, 2009, 12:16:39 PM »
This is a good topic.  My boat has bottom paint that needs some touching up on the transom and I have no idea what type it is.  It appears to be only one or two coats at most.  Is there a trick or rule of thumb to determin what type of bottom paint you have?  I don't think mine is the ablative type since I can see a greening discoloration or "patina" along the water line and the scuppers.  This leads me to believe I have standard bottom paint with copper in it not ablative.   Any suggestions?

Also what are the concerns with bottom paint on a boat that is kept on a trailer as is mine and I believe the original poster?
1998 Explorer w/ Etec 250


1987 170 w/ Evinrude 90

July 29, 2009, 10:22:15 AM
Reply #3

damnitbadger

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Re: First day out and a few bottom paint questions
« Reply #3 on: July 29, 2009, 10:22:15 AM »
Looks like some minor blistering and exposed glass. sand those areas back with a DA sander to gel coat, fill blisters with cabisol and coat exposed glass with a thin epoxy, primer seal and bottom paint. Wear a good respirator when sanding (not a dust mask) because bottom paint contains all kinds of nasty stuff and will make you ill. Bottom paint is great if you leave it in the water if even a few days at a time. If you trailer every time, when you rebuild remove the ablative bottom paint, reseal and apply a good hard bottom paint like Vivid or something comparable. That should last several seasons trailering. Depending on how many coats you have on your boat when you rebuild and remove the old bottom coat you will be removing many pounds of old paint. Soda blasting the hull is worth every penny. Ablatives contain copper and other metals. Most bottom paints can be reactivated with a good scrubbing using a stiff bristle brush. Spot painting is OK for a quick fix.
Beware the lolipop of mediocrity, lick it once and you will suck forever!

88\' CCP 222 w/200 EFI Merc

July 31, 2009, 07:18:47 AM
Reply #4

sandgnat

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Re: First day out and a few bottom paint questions
« Reply #4 on: July 31, 2009, 07:18:47 AM »
Many thanks!
I'll post some pics when I get going on this.
1970 22-2 Aquasport

 


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