Fiberglass question

[TConigliaro]

I have an old(60 yrs),12 ft Pan Yan cartopper that I have freshen up the skin
with new paint every 4 years. for the past 30 years.

I stored it outside for the first time in early June with a plastic tarp over it.
Well ,the intense heat /sun over the past 2 months must have crystalized a fiberglass patch
put on about 30 yrs ago.
I just easily pealed the patch off.
I can see the clear fiberglass weave of the fiberglass cloth piece that still stuck to the boat,
but it is worn in a few spots.(light shine through it form the inside).
The patch was on the bottom of the boat

The patch was about 14"x14"

I need some advice on these questions:

1)should I try to sand off the old fiberglass patch that remained before I do the new fiberglass repair job?
2)can someone recommend a fiberglass repair kit brand ?
3)is there some new waterproof material that I could spread on the area to avoid doing a a new patch?

Thanks
Tom

 

[RobertPammett]

What is the original "skin" - canvas or fibreglas?

 

[TConigliaro]

Robert:the originaL skin when the boat was made was canvas;that canvas was replaced with fiberglass in 1985
and that's what's on there now.

 

[Mark Y.]

Tom, I added decoy boards to my Devlin sneak box and glassed them in and also repaired and reinforced some areas on the boat. I would recommend the following:

Sand the area of the patch to remove all of the old material, as well as the surrounding area to give the new patch good adhesion. I used the West Epoxy system and couldn't be more pleased. It is definetely worth the extra money. As for a waterproof material for the repair instead of glass, I don't know of anything that I would consider reliable. If you apply the West System correctly, you will never have to worry about it again. It's not just the waterproofing. You also want strength and rigidity in the area of the repair. Just my humble opinion.
Mark

 

[RobertPammett]

Since the canvas was replaced long ago - do what Mark Y. says.

 

[TConigliaro]

Thanks ,Mark.
There are a lot of options when I searched "Epoxy kits' on West Marine's site so I will visit the store and see what they have in stock:
http://www.westmarine.com/webapp/wcs/stores/servlet/SiteSearchView?Ne=2010296&beginIndex=0&langId=-1&storeId=11151&page=CategoryDisplayLevel1&N=+710+2010296&catalogId=10001&pageSize=10&sType=SimpleSearch&viewTaskName=SiteSearchView

 

[Mark Y.]

Tom,
I had never worked with glass before and was quite apprehensive when I started the job, but I am quite happy with the job, even though I had never done glass work before. I will never use anything else now.

Mark