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Author Topic:   17 with small water blisters

BugsyG posted 12-02-2002 07:24 PM ET (US)
I had the boat professionally painted and it looks beautiful...Now i am getting small water blisters on the hull, now the boat has to go back to the guy who painted it for some warranty work anyways, and he is going to fix those blisters. In the mean time, what should i do about it?
11 footer posted 12-02-2002 08:01 PM ET (US)
Nothing,,, Thats his prolbem,
11
:)
JimU posted 12-03-2002 09:53 AM ET (US)
Make sure the blisters are paint blisters not gel coat blister. If you have gel coat blisters, they can't be repaired by painting over them. You have to grind out the blisters and repair them. West system has a very good video tape on such repairs. I've use the system to restore two early seventies 16-7's.
BugsyG posted 12-03-2002 04:49 PM ET (US)
These are paint blisters.
John W posted 12-04-2002 02:08 PM ET (US)
Are they above or below the waterline? If your entire hull is painted (below the waterline), expect the blisters to re-appear if you leave the boat in the water for any extended period (48 hours or more). This is why these paints are only reccommended for above-the-waterline applications.
If the blisters are above the waterline, the paint had an adhesion problem, most likely caused by contaminants on the gelcoat surface prior to painting. Mold release agents can still remian on the outside of a boat many years after manufacture, and they will cause paint to lift if the boat isn't cleaned completely with the appropriate solvents reccommended by the paint manufacturer. Oils from your hand on the surface prior to painting can be enough to cause a problem.
In any case, your paint guy seems willing to fix it, which will involve sanding off the blisters & repainting that section of the boat I would imagine. Don't do anything to the boat in the meantime.
BugsyG posted 12-04-2002 03:32 PM ET (US)
Thank you very much...The whole boat is painted but the bottom has bottom paint on it too....Its the correct bottom with the barrier coat and the black antifoulant paint. blisters are above the water line...2 are below but they are small.

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Author	Topic: 17 with small water blisters
BugsyG	posted 12-02-2002 07:24 PM ET (US) I had the boat professionally painted and it looks beautiful...Now i am getting small water blisters on the hull, now the boat has to go back to the guy who painted it for some warranty work anyways, and he is going to fix those blisters. In the mean time, what should i do about it?
11 footer	posted 12-02-2002 08:01 PM ET (US) Nothing,,, Thats his prolbem, 11 :)
JimU	posted 12-03-2002 09:53 AM ET (US) Make sure the blisters are paint blisters not gel coat blister. If you have gel coat blisters, they can't be repaired by painting over them. You have to grind out the blisters and repair them. West system has a very good video tape on such repairs. I've use the system to restore two early seventies 16-7's.
BugsyG	posted 12-03-2002 04:49 PM ET (US) These are paint blisters.
John W	posted 12-04-2002 02:08 PM ET (US) Are they above or below the waterline? If your entire hull is painted (below the waterline), expect the blisters to re-appear if you leave the boat in the water for any extended period (48 hours or more). This is why these paints are only reccommended for above-the-waterline applications. If the blisters are above the waterline, the paint had an adhesion problem, most likely caused by contaminants on the gelcoat surface prior to painting. Mold release agents can still remian on the outside of a boat many years after manufacture, and they will cause paint to lift if the boat isn't cleaned completely with the appropriate solvents reccommended by the paint manufacturer. Oils from your hand on the surface prior to painting can be enough to cause a problem. In any case, your paint guy seems willing to fix it, which will involve sanding off the blisters & repainting that section of the boat I would imagine. Don't do anything to the boat in the meantime.
BugsyG	posted 12-04-2002 03:32 PM ET (US) Thank you very much...The whole boat is painted but the bottom has bottom paint on it too....Its the correct bottom with the barrier coat and the black antifoulant paint. blisters are above the water line...2 are below but they are small.