Resin choice and layer application question.

adamjr

Petty Officer 1st Class
Joined
Jul 23, 2009
Messages
272
If this is a dumb question feel free to say so.

I am thinking about doing a transom repair to the boat that's been sitting in my driveway what seems like forever. I'm having no luck selling it for the value of the motor.

The transom is rotten. The keel is split. The outer skin is ugly to the n'th degree. What I wanted to do was use the outer skin as a backing surface to do the repair. The plan was to cut the splash guard out and remove the inner transom skin and the rotted wood. Grind out the hull and bottom from the inside to a taper that almost cuts the outer transom skin off. It would be almost like using what's structurally bad as a mold.

So far sounds challenging, I know.

At this point I would mask off the edges and sides of the hull and apply mold release to the inner surface of the outer transom skin. Then un-mask it to begin the lay up process.

Here's the meat of the question now that you have a background. If I were to lay up 2 layers of 1 1/2 ounce chopped strand mat followed by 1 layer of 6 ounce fabric as my first application could I use the following resin: For the first layer only use waxed poly resin followed immediately by the next layer of mat and the layer of fabric with unwaxed provided that layer 2 and 3 are applied before the first layer kicks? I would be following that with 4 more layers alternating 1 mat and 1 fabric.

If I were to do it that way would the wax be far enough away from the 3rd layer that when the third layer kicks I can apply the following layers and still have them form a chemical bond? I don't want to do it all and have to worry about it all delaminating. At the end of the job I want to be able to grind the edge of the original outer skin and have a nice smooth paintable surface.

Or am I just dreaming? Otherwise I would do it all the same except for the first application being waxed and after cutting the original skin I'll lay up an additional layer of CSM with the waxed resin as my final application.
 

Woodonglass

Supreme Mariner
Joined
Dec 29, 2009
Messages
25,932
Re: Resin choice and layer application question.

why don't you just do a NORMAL Transom Repair. MUCH easier than what you are describing.
 

adamjr

Petty Officer 1st Class
Joined
Jul 23, 2009
Messages
272
Re: Resin choice and layer application question.

why don't you just do a NORMAL Transom Repair. MUCH easier than what you are describing.

I am not sure how much easier it would be considering that the outer transom skin is separated from the hull at the keel.
 

Wingedwheel

Lieutenant Junior Grade
Joined
Jun 16, 2009
Messages
1,071
Re: Resin choice and layer application question.

There are plenty of posts that describe using a chainsaw(electric or gas) to cut out the rotted wood without removing the inner or outer skin. Once the rot is cleaned out, you can do the repair with Seacast product. When I started my repair and assumed it would only be the transom I priced it. Although expensive, it was still a cheaper and quicker alternative to replacing and reglassing. Plus it was much less labor intensive.
 

Yacht Dr.

Vice Admiral
Joined
Feb 26, 2005
Messages
5,581
Re: Resin choice and layer application question.

Hello adamjr...

I for one like your thinking...I repaired my first boat ( 30' 65 catalina off of ST. Thomas after hurricain hugo hit in this way..kinda ).

If I get your thinking right..you want to make a mold of the shell..then grind and glass from inside..then you grind and bevel and glass outside as well ( Its a must ! ).

Do not add wax to anything..you put your mold agent ( 3x ) and pop your mold..then grind away..put your mold up ( 3x agent again ) and glass away..

Then grind outside and glass..glass..fair..glass..fair..glass and prime and finally you can gel/prime for paint and finish.

There is no easy cure for inside/outside repairs.. and wax is a no no in your resins for this repair...

If I get your post right......

YD
 

jonesg

Admiral
Joined
Feb 22, 2008
Messages
7,198
Re: Resin choice and layer application question.

I would chop the boat up, sell the trailer and motor seperate.
Or find a better boat after scrapping this one.
 

ondarvr

Supreme Mariner
Joined
Apr 6, 2005
Messages
11,527
Re: Resin choice and layer application question.

Like already said, whatever the repair process skip the waxed resin.

What you want to do is feasible, but impractical.

If I understand this correctly.

You want to use the inside surface of the old transom as a mold surface, then I assume remove it and use the new layup as the outside skin.

It will work...BUT.... you will be doing a great deal of grinding on the inside to get it even somewhat level, smooth, true, or whatever you want to call it and once you pull the old transom off you'll be doing a great deal of grinding to try and get it even more true.

Your best bet would be to grind and layup the transom in a more traditional method and then just rework the outside so it looks good again. This will take care of the all the worn, torn, ripped, fractured and broken glass on it, and the rest of the hull.



The other method would be to cut the old transom off, then use a flat panel as a mold surface and place it over the stern to use as a mold and create an entirely new transom. This will skip the inside grinding and then fairing the outside in an attempt to make it look good.


The reality is unless you really like this boat and want to get it back on the water and use it yourself, just pull the motor off and junk it, because the time and money you put into it will never be recovered in any type of repair you do to it.
 

adamjr

Petty Officer 1st Class
Joined
Jul 23, 2009
Messages
272
Re: Resin choice and layer application question.

JonesG and Ondarvr you both have it right. It's a boat I love but there are a few things I would like to change. It's a 1972 Cruiser's Inc. Cuddy. I love the look. But this post was in a moment of weakness where I was really wanting to keep it.

I stopped in at my favorite land locked boat dealer on Wednesday and saw my dream boat. It is a 26 foot Cruiser's Inc cabin cruiser. It has a small block chevy and a mercruiser I/O which I am guessing was a repower. Every other Cruiser's Inc I've ever seen whether I/O, Inboard or Outboard has been OMC all the way if it was pre them becoming Cruiser's Yachts. The boat is exactly what I want in a boat suitable for big water. It has a huge deck and a cabin that can sleep 4 max or 2 really comfortably with a lot of storage.

My local waste management land fill told me I would have to cut it up so I could dispose of it in a dumpster. Cost would be $53.00 plus $10.00 environmental fee. One of my customers is Veolia Disposal. I was there yesterday and as I was leaving the scale house person was coming in. She said for $65.00 I can trailer in the boat and theyt have a place I can back it up and hook the stern eyes to and just pull away. So for $2.00 more I have no labor involved and the hull is gone. My buddy with the cherry picker is going on vacation for a couple of weeks. When he gets back we're pulling th emotor if I can't get someone to buy it and pull it before then.

About 6 weeks ago we got a 1965 Clipper Craft 16 foot runabout with an 85 horse Chrysler. I picked up a basket case 75 chrysler that has a working tilt/trim unit I am going to install. This will be my boat while I am saving and looking for a Cruiser's Inc that is bigger, sea worthy NOW, and at a good price.

Thanks for the input though.
 
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