www.iFourWinns.com

Dedicated to Current and Future Owners
It is currently Thu Mar 28, 2024 1:19 pm

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
PostPosted: Mon Oct 17, 2016 1:36 am 
Offline
Dolphin

Joined: Tue Jun 10, 2014 7:01 am
Posts: 80
Hello,

while driving the boat to the trailer for slipping, we've made a mistake. :roll:
We drove very slowly, but we hit the trailer.

Now I have two little scratches in the hull.
The gelcoat is broken and you can see the fiberglass.
From insight, everything is in a good condition, there is nothing broken.

The bigger scratch is 4-5mm deep and has a size of 1 centimeter.

Here you can find a photo: https://www.boote-forum.de/attachment.f ... 1476634024


How can I fix this?

At the moment there ist antifouling around.

These steps are my idea of fixing:

-1 cleaning/sanding out the holes and the area around
-2 put some epoxyresin in the holes
-3 sanding again
-4 filling with gelcoat
-5 sanding
-6 polishing
-7 painting with epoxy antifouling primer
-8 painting with antifouling

My question is, if I've to put resin in the hole for warterprotection or is gelocoat enough?


How would you fix this?


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 7:20 am 
Offline
email admin your custom rank

Joined: Sun Jul 22, 2012 5:10 pm
Posts: 2032
Location: West Palm Beach, FL
4-5 mm is very deep. For a repair that deep, I would use some fiberglass cloth to reinforce the resin. Often, you sand the hole larger to taper the edges out, then resin in fiberglass "patches" that start larger and progress smaller to fill out the center low spot.

Will this area always be coated with antifouling paint? If so, why even bother with gelcoat? Once the fiberglass/resin repair is complete and smooth, you could just prime and paint the antifouling over it.

_________________
Image
"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 9:23 am 
Offline
Dolphin

Joined: Tue Jun 10, 2014 7:01 am
Posts: 80
Thanks for the reply.
The depth is 4-5 (maybe less) millimeters not centimeters.
But I don't know if i can put fiberglass/resin into it. It's really small. The diameter is smaller than a dime.
At the picture it looks bigger than it is.

This area is always coated with antifouling.


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 9:35 am 
Offline
email admin your custom rank

Joined: Sun Jul 22, 2012 5:10 pm
Posts: 2032
Location: West Palm Beach, FL
Yes, I know you said millimeters. Resin by itself cracks very easily. I always use it with fiberglass to reinforce and prevent cracking. For a small repair like yours, just a thin fiberglass cloth will do...using as many layers as will fit.

After sanding the hole open a bit and tapering the sides out, the sequence is like this:
1. Brush some resin mix on the repair area surface
2. Stick a layer of fiberglass cloth to the wet resin
3. Brush just enough more resin to coat the fiberglass and not have any air bubbles
Repeat steps 2-3 several times to build up thickness (without waiting for the resin to cure).
4. Wait for it to harden (cure)
5. Sand down the high spots with a disk sander.
If you still have any low spots, repeat steps 1-5

_________________
Image
"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 1:11 pm 
Offline
email admin your custom rank

Joined: Tue Jun 26, 2007 10:46 pm
Posts: 1146
Location: San Diego, CA
Could you use a structural filler, similar to this?
http://www.westmarine.com/buy/west-marine--marine-structural-filler-quart--347610
Looks like it has the fiberglass strands already included versus using cloth and resin.

_________________
2002 Funship 214
VP 5.7 GX Si
2003 Tahoe


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 2:33 pm 
Offline
Seahorse

Joined: Tue Aug 11, 2015 9:57 am
Posts: 23
A quick and easy fix might be to fill the hole with epoxy and sand it smooth when you are done. I did this when I repaired some holes left by an old transducer and it worked wonderfully but it was not very pretty (might not matter in your case). When I took my repair to the shop to be covered by gelcoat my fiberglass repair guy told me that gelcoat will not bond well with epoxy sometimes (I think it depends on how it cured) and he sanded back some of the epoxy and put a layer of fiberglass before applying the gelcoat so the gelcoat would adhere better. Like rpengr suggested earlier, if you are going to cover this with anti-fouling you might consider just leveling off the hole with some epoxy and skip the gelcoat since it will be covered by anti-foul (I am assuming the anti-foul will stick to the epoxy well). An epoxy or one-step fiberglass filler similar to what EvilZ suggested might be a lot easier than using the fiberglass material if you haven't worked with it before.

_________________
2003 FW 170 Freedom 4.3 GL/SX


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 4:00 pm 
Offline
email admin your custom rank

Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5661
Location: Long Island NY
http://www.rotdoctor.com/products/fillit.html

I don't know if a product like this is available where you are located but I have used it in numerous different repairs on both wood and fiberglass and it works great. I have small holes I filled more than 10 years ago and it still looks good. It is an epoxy based product but reinforced with fiberglass strands. For that repair you could put it on in 2 applications and it would fill that easily and you can sand and shape it just like fiberglass. You can just put your antifouling paint right over it.

_________________
88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II


Top
 Profile  
 
PostPosted: Mon Oct 17, 2016 4:01 pm 
Offline
email admin your custom rank

Joined: Sun Jul 22, 2012 5:10 pm
Posts: 2032
Location: West Palm Beach, FL
EvilZ wrote:
Could you use a structural filler, similar to this?
http://www.westmarine.com/buy/west-marine--marine-structural-filler-quart--347610
Looks like it has the fiberglass strands already included versus using cloth and resin.

Yes, that should work.

_________________
Image
"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings


Top
 Profile  
 
PostPosted: Tue Oct 18, 2016 1:24 am 
Offline
Dolphin

Joined: Tue Jun 10, 2014 7:01 am
Posts: 80
Thanks a lot for the replys.

Sometimes it is difficult to get the same products like yours in the US (outside europe).
But yes indeed, I can fill it with with an epoxy filler with fiber in it.
I found Watertite (http://www.yachtpaint.com/usa/diy/produ ... =watertite ) in a boatshop next to us.

So I'll try to do it by filling the hole with epoxy/fiber filler or watertite, covering with gelcoat and putting antifouling primer and antifouling on it.

For me it is not necessary to save time or a few bucks by putting "just" a filler on it.
I like to repair it in the best way, I can do.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group