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Oxidation on the bottom paint?

Old 01-13-2019, 03:03 PM
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Default Oxidation on the bottom paint?

Purchased this boat last spring but first boat with bottom paint. Noticed after several times on and off trailer that the bottom paing had streaks in it. Closer evaluation the white residue scratches off with light wire brush. Is this normal or what is the prefered method to remove white film while on trailer?
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Old 01-13-2019, 03:20 PM
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Possibly ablative paint. . If you are going to trailer it but still need bottom paint, then go with a hard multi seasonal paint.
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Old 01-13-2019, 07:34 PM
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Originally Posted by fireisland1 View Post
Possibly ablative paint. . If you are going to trailer it but still need bottom paint, then go with a hard multi seasonal paint.
I dont think I need bottom paint as I dont leave in the water. Can it be removed? Or any benifit to having it if not kept in water?
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Old 01-13-2019, 07:44 PM
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You can remove it . There are a lot of threads about it. It’s expensive and difficult. The easiest is do a real good job of pressure washing. Sand smooth if you can. Power wash again. Then get hard bottom paint . Apply 2 coats. Get a color you can live with. Some even use white. Then forget about it.
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Old 01-14-2019, 04:49 AM
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Try wiping the bottom paint in a small spot with a strong rag and a solvent, IE acetone, lacquer thinner, etc. It usually removes the outer most surface layer of paint / oxidation. If it works on the small spot then continue over the rest of the bottom. If it doesn't remove the oxidation layer on your bottom paint, then no need to continue. I have done this on my boat and it works very well. A gallon of acetone is about $15, I think I used about a half gallon for an 18 foot boat.

edit - you actually have white below the water line, and green from the copper above the water line. My boat was the same, and the acetone removed both types of oxidation.
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Old 01-14-2019, 04:39 PM
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Doesnt seem to be taking paint off but just the outer white crust.


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Old 01-14-2019, 05:58 PM
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some paints are not meant for trailered boats

you may have to replace with something else

can you find out from the prior owner exactly what paint he used?
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Old 01-14-2019, 06:05 PM
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The white stuff is being removed fairly easy with little pressure from a medium buffer ball inserted in a drill. Kind of looks like years of salt drying on the hull. Lots of dust flying in the ait as it is coming off.
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Old 01-14-2019, 06:24 PM
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Originally Posted by Iwaterdave View Post
The white stuff is being removed fairly easy with little pressure from a medium buffer ball inserted in a drill. Kind of looks like years of salt drying on the hull. Lots of dust flying in the ait as it is coming off.
Hopefully you are wearing protection: clothes, eyes, mouth, etc. usually people sanding bottom paint wear a full tyvek suit with respirator.
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