Refinishing bottom - Gel Coat or Bottom Paint?

mchris3

Recruit
Joined
Sep 19, 2017
Messages
1
Hi, I recently purchased a 1988 Livingston 15.5. The previous owner seems to have used a low quality bottom paint that was badly oxidized and was covered in barnacles. I have the boat flipped over and have removed all of the old layers of paint all the way down to the primer and, in some spots, fiberglass. So, pretty much I have a clean slate and would like some advice as to how to proceed. The boat will be trailered a majority of the time, with use primarily in lakes and partially in ocean, with some of that salt water time being in a slip. I have done quite a bit of research and have come to the conclusion that bottom paints are only temporary. I then looked into gel coats but found that those are quite difficult to apply. My primary concern is the longevity of the paint, and not so much biocide properties, considering the fact that I will most often be trailering it and can scrub off whatever life may attach itself in ocean visits.
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
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18,868
:welcome:

Once you have about 4 posts under your belt, you can post some pictures of the boat. (you will have to reduce the size of the pictures to about 200 KB)

Seeing what you are seeing would help.

Preferably, you want gelcoat over the bare fiberglass, then a barrier coat over the gelcoat, then finally the anti-fouling paint. If you leave the boat in ocean waters for about a week or two, stuff will already be growing on it, unless you use an anti-fouling paint.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
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51,923
if your going to slip the boat for any length of time, you will need to re-apply the bottom paint.

marine critters start growing on the hull after about 2 days

and yes, bottom paint is something that gets re-applied about once every few years.
 

PCUK

Petty Officer 3rd Class
Joined
Sep 22, 2011
Messages
82
Bottom paint as you call it (in the UK it is called antifouling and better explains what it does) is only there to stop growth on the bottom of the boat. It has no protective qualities for the fibreglass at all. Your best bet is to apply a coat of epoxy resin (such as West 105 Epoxy) then use thickened West epoxy to fair the bottom and make it smooth, then apply another two coats of epoxy which will completely protect the bottom. Then you can use any bottom paint you want and re-coat it as required.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,932
Since it's gunna be a Trailer Queen, All that's required is to remove all the barnacles and coatings on the hull, and then Prime and Paint. If you're wanting to save some money you can use Rustoleum Pro Acrylic enamel with an added Hardener and get great long lasting results. There are other two part paints that can be used but they are a lot more money. The last link in my signature line will explain how to use the Rustoleum or Tractor paint.
 

Dennischaves

Chief Petty Officer
Joined
Nov 9, 2016
Messages
439
definatly go with the rustoleum with hardner
Works real good and its super shiny
I did the last coat of paint on my hull 3 days ago and its rock hard already!
 
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