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  #1  
Old 07-31-2014, 05:30 PM
Robby k Robby k is offline
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Join Date: Aug 2013
Boat: 1985 stars and stripe 351w powerslot
Location: midwest
Posts: 8
Air bubbles in gel coat

I have a 1985 S&S. The color is grey and blue. I have noticed on the top sections of the boat there is very tiny looking air bubbles. The finish on the top sections is reflecttive but not glossey. Just wondering what the are and any ideas to remove them. I have heard that this may be called porosity
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  #2  
Old 07-31-2014, 10:43 PM
atihanyi atihanyi is offline
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Join Date: Sep 2013
Boat: mastercraft prostar 190 1992 w/powerslot
Location: Wisco
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post some pics and we will have a look
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  #3  
Old 08-01-2014, 09:05 AM
cruiser cruiser is offline
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Boat: 1981 mastercraft S & S 351W PowerSlot
Location: Mid-Michigan
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Must have pics. I worked with gel coat quite a bit in my younger days. Mixing too aggressively can cause air bubbles as well as too much hardener not allowing the mix to gas out before it sets up.
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sand with red metalflake stripe

Last edited by cruiser; 08-01-2014 at 12:09 PM. Reason: spelling
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  #4  
Old 08-01-2014, 10:44 AM
Robby k Robby k is offline
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Join Date: Aug 2013
Boat: 1985 stars and stripe 351w powerslot
Location: midwest
Posts: 8
I am at work i will post later a pic but this is from the factory. I have done any work to the gel coat except polish and wax.
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  #5  
Old 08-01-2014, 03:37 PM
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kyfooter kyfooter is offline
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Boat: 2013 197 WTT / 1992 Barefoot Sanger
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Not sure if it makes sense if we're talking about gelcoat on the bow of the boat, but might it be blistering? Water making it's way between the gel and fiberglass?

Much more common in the hull obviously.
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  #6  
Old 08-01-2014, 04:59 PM
Robby k Robby k is offline
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Join Date: Aug 2013
Boat: 1985 stars and stripe 351w powerslot
Location: midwest
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This is on the top back behind the back seat
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  #7  
Old 08-02-2014, 11:09 AM
cruiser cruiser is offline
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Boat: 1981 mastercraft S & S 351W PowerSlot
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Hard to tell, are there air bubbles in the white gel or just the blue?
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1981 stars and stripes -powerslot
sand with red metalflake stripe
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  #8  
Old 08-03-2014, 08:57 AM
Robby k Robby k is offline
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Join Date: Aug 2013
Boat: 1985 stars and stripe 351w powerslot
Location: midwest
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As far as I can see just the blue.
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  #9  
Old 08-03-2014, 10:13 AM
cruiser cruiser is offline
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Looks like there was a problem with the blue from the factory or mother nature took its tole over the years. If there is a spot that you can try that cant be seen, try wet sanding then buff to see if the bubbles can be taken out. Like kyfooter said the blistering usually takes place on the bottom of the hull.
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