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Thoughts on minor "spider cracks"?

Apr 21, 2021
13
C&C 30 Harrison Township, MI
This 42 year old new to me C&C is mechanically, and structurally sound, and is seaworthy, but is also a "project boat" in that lots of minor, some cosmetic some functional tweaks need to be made. The black paint is worn off much of the pedestal which needs painting. Some instrumentation needs to be added, or replaced, but there are lots of "spider cracks" on some of the fiberglass and plastic surfaces. Close examination shows these cracks are no more than an eye sore. I am thinking of cleaning and filling them with 3M 4200. Even if the whites don't match I think a white filled crack will look better than a black unfilled one. Any thoughts?
 
Jan 11, 2014
7,270
Sabre 362 113 Fair Haven, NY
This might work for the short run, but it will make any long term fixes more difficult. My advice is to learn to live with the cracks, most old boats have them. Or repair them properly, open them up, fill with gelcoat, sand, polish, buff. Work on small areas that are the most annoying to you.
 
Apr 21, 2021
13
C&C 30 Harrison Township, MI
This might work for the short run, but it will make any long term fixes more difficult. My advice is to learn to live with the cracks, most old boats have them. Or repair them properly, open them up, fill with gelcoat, sand, polish, buff. Work on small areas that are the most annoying to you.
After your post I found "Gel Coat Scratch Patch." Same theory, better material, at least for some surfaces. Some of the worst pieces are not gelcoat, but flexible heavy duty plastic of some sort. I will have to be more discriminating applying different fillers to different surfaces.
Thanks.
 
Sep 28, 2020
11
Cal 21 Cow Island NH
This 42 year old new to me C&C is mechanically, and structurally sound, and is seaworthy, but is also a "project boat" in that lots of minor, some cosmetic some functional tweaks need to be made. The black paint is worn off much of the pedestal which needs painting. Some instrumentation needs to be added, or replaced, but there are lots of "spider cracks" on some of the fiberglass and plastic surfaces. Close examination shows these cracks are no more than an eye sore. I am thinking of cleaning and filling them with 3M 4200. Even if the whites don't match I think a white filled crack will look better than a black unfilled one. Any thoughts?
There’s a guy on YouTube (boat works today) who has dozens of “ how to”videos including the repair of spider cracks in your gel coat. I have found him quite helpful with a number of things.
 
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Jan 11, 2014
7,270
Sabre 362 113 Fair Haven, NY
There’s a guy on YouTube (boat works today) who has dozens of “ how to”videos including the repair of spider cracks in your gel coat. I have found him quite helpful with a number of things.
:plus: Andy Miller is skilled fiberglass repair guy. You can find his website at Boatworkstoday.com and on YouTube.