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Author Topic: Bumps in gel coat?  (Read 1427 times)

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Offline digitish

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Bumps in gel coat?
« on: June 06, 2020, 10:36:08 AM »
Went to look at a CVX-16 yesterday. The boat seemed to be in pretty good shape but the gel coat has lots of bumps in it. See attached pics.

Does this mean the core is bad?

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Offline still_fishin

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Re: Bumps in gel coat?
« Reply #1 on: June 06, 2020, 01:50:39 PM »
Everyone of those has an air pocket behind it.  They need to be ground out, filled then the bottom needs to be refinished.  It ends up being quite a bit of work. 

Sent from my SM-G950U using Tapatalk

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'80 Intimidator
'85 CV23

Offline Plugcheck

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Re: Bumps in gel coat?
« Reply #2 on: June 06, 2020, 02:03:17 PM »
Do some research on osmotic blisters, fairly common on fiberglas hulls that spend lots of time in water. 
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Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline dorelse

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Re: Bumps in gel coat?
« Reply #3 on: June 06, 2020, 02:51:16 PM »
That's a hard pass for me.
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1990 Sierra 1700

Offline digitish

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Re: Bumps in gel coat?
« Reply #4 on: June 06, 2020, 03:55:12 PM »
Thanks guys, sounds like a lot of work. The search continues.

Is it okay leave these older boats in the water for the summer (3-4 months) or do they need to be on a lift?
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Offline Plugcheck

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Re: Bumps in gel coat?
« Reply #5 on: June 06, 2020, 04:15:19 PM »
IMHO, all boats should be stored on lifts, those that cannot need to have some ablative coating on the hull.
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Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Hyperacme

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Re: Bumps in gel coat?
« Reply #6 on: June 06, 2020, 05:55:38 PM »
Welcome to the forum Digitish !
All though you've been a member for five years now .. LOL

Mike's write up on "Osmotic Blisters"
http://forum.cgoamn.com/index.php?topic=7651.0
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