What is the complete finishing sequence?

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stephenburnett
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What is the complete finishing sequence?

Post by stephenburnett »

I would appreciate some advice concerning the finishing order of a fibre glass covered wooden boat
My understanding is as follows....
1.Two coats of epoxy on all wood surfaces
2.Two layers of Fibre glass cloth over the hull - suitably applied with epoxy
3.Coat the fibre glassed hull with fairing compound
4.Sand smooth
5.Paint or Gel-coat the finish over the smoothed out fairing compound

Looking forward to your words of wisdom
Warm regards
Stephen Burnett

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kens
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Re: What is the complete finishing sequence?

Post by kens »

Here is my process:
1. encapsulate the wood with clear resin
2. fair smooth with filler as required (do not sand thru to bare wood, re-encapsulate as required)
3. apply cloth
4. fill cloth weave with resin
5. sand smooth the resin ( do not sand thru the cloth, re-coat as required)
6. prime & paint as required
Oak..........the juice ain't worth the squeeze :D :shock: :o :)

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Bill Edmundson
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Re: What is the complete finishing sequence?

Post by Bill Edmundson »

Stephan

1 coat of resin on the bare wood. (Optional)
When the resin is dry to the touch (1 or 2 days) Then 1 layer of fiberglass.
Then 2 or 3 coats of resin. Wait about a week.
Sand smooth.
Thoroughly wash down with soap and water.
Varnish, polyurethane, or paint for UV protection.

If you are worried about abrasion, there are better option than glass cloth.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

hoodman
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Re: What is the complete finishing sequence?

Post by hoodman »

I'm not sure why there are so many folks that think you need more than one layer of cloth. From what I understand you're just adding weight.
Matt

Building a Geronimo......!
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kens
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Re: What is the complete finishing sequence?

Post by kens »

hoodman wrote:
Sat Nov 14, 2020 8:29 pm
I'm not sure why there are so many folks that think you need more than one layer of cloth. From what I understand you're just adding weight.
there is a different wood boat design website that uses wood as the core material, and glass cloth is the structural component. it is a wood core sandwich composite, and stitch & glue. Perhaps there is confusion between the 2 types of build process.
Glen-L designs with wood as the structural component,,, versus that other design has wood as the core of a composite sandwich
Oak..........the juice ain't worth the squeeze :D :shock: :o :)

stephenburnett
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Re: What is the complete finishing sequence?

Post by stephenburnett »

Greatly appreciate all your answers
The painted finish over the fibreglass cloth on my boat looks unappealing and I can clearly see the weave under the paint. I was told that once I painted over the FG cloth I could not apply a fairing compound to improve the finish. However my local FG shop suggested a product called Slicksand would work as a fairing material. Any advice on how to proceed?

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Roberta
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Re: What is the complete finishing sequence?

Post by Roberta »

Slicksand is a filler primer and not meant for fairing. System Three makes several products for fairing. Fairing needs to be done after planking and before fiberglassing. My recommendation is to strip down to bare wood, properly sand the surfaces level, add any necessary fairing and contour in, fiberglass with one layer of 6 oz. cloth, make sure weave is filled, then use a primer and top coat per mfg. instructions.

Roberta
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

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acflynn
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Re: What is the complete finishing sequence?

Post by acflynn »

Sorry for the late response. I'm following this with interest. I'm planning on having a bright finish on my plywood hull (18' Mist Miss design), but did want to paint some stripes below the sheer. At which point in the sequence would that be done? From above:

1. Fair the hull (potentially with fairing compound as needed) and sanding
2. Encapsulate with resin (1 or 2 coats)
3. Sanding of the resin as needed
4. Fiberglass application with resin (1 cloth thickness, probably overlapping at keel; 2-3 resin coats)
5. Sanding
6. Washing down (is this just for amine blush?)
7. Painting of stripes
8. Varnish/poly (multiple coats, with some sanding in-between as needed)

Would anyone add stripes after the varnish/poly stage? I'm guessing that would need protection as well, so the stripes would last longer under all the varnish (but hopefully not yellowing). Would this also be the same sequence for painting the name on the transom, or is that done over the varnish (or in-between coats, I guess)?

Thanks!

- Andrew
Slowly building a Mist Miss in the Arizona desert

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kens
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Re: What is the complete finishing sequence?

Post by kens »

acflynn wrote:
Thu Jan 21, 2021 5:00 pm
Sorry for the late response. I'm following this with interest. I'm planning on having a bright finish on my plywood hull (18' Mist Miss design), but did want to paint some stripes below the sheer. At which point in the sequence would that be done? From above:

1. Fair the hull (potentially with fairing compound as needed) and sanding

I not sure what you mean by fairing with fairing compound. you mean fair the hull before installing the plywood?
Do you mean fairing compound on top of the plywood?
Fairing compound on top of the plywood forces you to paint the whole thing, no bright natural finish.

2. Encapsulate with resin (1 or 2 coats)
3. Sanding of the resin as needed
4. Fiberglass application with resin (1 cloth thickness, probably overlapping at keel; 2-3 resin coats)
5. Sanding
6. Washing down (is this just for amine blush?)

my preferred method is wet sanding which takes care of this

7. Painting of stripes

most colored paint are a good UV product, no need for extra UV protection over stripes paint, unless, your paint specifically requires a clearcoat (some automotive paints do this)

8. Varnish/poly (multiple coats, with some sanding in-between as needed)

yes, some kind of UV protection over bare epoxy

Would anyone add stripes after the varnish/poly stage? I'm guessing that would need protection as well, so the stripes would last longer under all the varnish (but hopefully not yellowing). Would this also be the same sequence for painting the name on the transom, or is that done over the varnish (or in-between coats, I guess)?

Thanks!

- Andrew
Oak..........the juice ain't worth the squeeze :D :shock: :o :)

Hercdrvr
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Re: What is the complete finishing sequence?

Post by Hercdrvr »

Prayer and meditation is a good place to start a varnish job. 😀
Matt B

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