Removing fiberglass

Hi All,

Years ago I built 5 wood strip boats (kayaks and canoes) and sold one to a friend who would like to have the hull brought back to its original color.  The dark cedar strips in the hull have faded and looks "plain" by comparison to the interior which has retained the light and dark strip mix.

I've done repairs before where I took the fiberglass off to fix a foot-long gash but never removed the fiberglass off an entire hull.  So two questions - 

1) would the forum recommend using a heat gun to begin the process, heating and scraping then sanding off all the glass and resin, and 

2) is this necessary to get back to the original color?

I'm assuming stripping off all the glass then sanding and reapplying the fiberglass and varnish will restore the canoe to its original color scheme. but if I'm wrong it would be good to know upfront.  Some photos up on Dropbox.

Thanks,

Chris

https://www.dropbox.com/scl/fi/glz66jtxmii4lxf2b144a/6.26.08-008.jpg?rlkey=6ioiux5t5r8yon0z7oqaj5lsr&st=ym6wr0mm&dl=0

https://www.dropbox.com/scl/fi/m8ks9h21hjrm6g6hjnc5d/6.26.08-002.jpg?rlkey=mkurmqzmshd02zslh1x7pbgab&st=diqovlio&dl=0

 

Hi CRH.

Just by way of background, I have built several strip-build kayaks over the years and have performed various levels of refinishing including removing all the glass.

I also took a look at your pictures.

First, pulling all the glass off is a lot of work and has a lot of potential for damage and introducing other new defects.  Candidly, when I looked at your pictures, your canoe looked very nice and did not strike me as being at the point where I would take the hassle and risk of pulling the glass off.  I really could not see anything that looked bad.  So I am assuming that perhaps, compared to the inside (which you did not include a picture of) the wood may have faded a bit.  But when I am thinking of glass removal, I am usually in a situation where the glass itself is in pretty bad shape  (multiple repairs, seeing the weave becoming white, water damage, etc.)…or I want to take a finish that is natural, and potentially stain it for a whole new look.  

That said,  if you insist, a heat gun would be my initial choice.  But because your canoe is a natural color, you have to be very very careful to not burn or otherwise discolor the wood due to heat.    Second alternative would be 80 or 60 grit sanding…..but that has its challenges as well….but burning and discoloration are not one of them.  Frankly, I would leave it alone or build a test panel and try both techniques.  I have never stripped a natural wood colored boat that looked so nice….i stripped a boat that had a dark stain applied and I was able to re-stain as part of the restoration which made any new defects disappear.   In stripping and refinishing, also, you often lose somewhere between a ½ to 1 millimeter of wood thickness when you sanded it all out to clean underlying wood…..so you do need to ensure you have enough wood to support that.    on the boat I fully stripped and re-glassed I started with ¼ thickness….so I had a lot of material to work with.

Second, it doesn’t look like you have a glass problem based on the picture.   If the wood has sun-faded, you will have to experiment to see how much you have to sand to get back to the color you wanted (not the note above regarding losing ½ to 1 mm of thickness).  If somehow the issues is the varnish and not the underlying wood, maybe no stripping of glass is required.

Anyway, I guess what I am saying is that you might want to consider leaving it alone……but if you want to proceed, I would try to organize some experiments (test panels and/or maybe on the bottom of the boat) to sort out what’s going to work or not before going all in.

fwiw, Mark N, who also is on this forum a lot builds strip kayaks with a natural finish and i would also seek his counsel as you are exploring this question.

Beautiful boat.

Regards,

H

 

below is picture of some of my work

   Hi H,

Thank you for the response, it helps clarify the issue.  But, my mistake only displaying the Before pic and not the After.  The link below indicates the boat as it shows now with the new owners in Tahoe.  

If I can avoid stripping off the whole hull's worth of fiberglass and just sanding down a layer of varnish and then applying new varnish, I would love to do that.  But I suspect that is not feasible.  We will test as you suggest and proceed accordingly.

The canoe is 3-4 hours away in Tahoe and I'll have to bring the whole repair kit with me so knowing in advance what to expect really helps.  If you have any other suggestions, I'm open to all advice.

And your kayak is beautiful too, congratulations!

CRH

https://www.dropbox.com/scl/fi/kuhbumklynib9n2rmdv0n/Canoe-now.jpg?rlkey=25eypr0w3lpuxjw678u0tjws8&st=yenu8wbd&dl=0

And one of my kayaks:

https://www.dropbox.com/scl/fi/w7mfbqo8jpr8d1awby5kj/DSC00012-7-edited.JPG?rlkey=6pd1p6v3qwzvwdw27w09akaev&st=patqzsjc&dl=0

 Hi CRH, 

thanks for the new pictures.  very nice work.

on the new picture of the canoe (current condition)...it seems pretty clear the color has faded/been sun bleached.

but i see nothing in the picture that shows a problem with the glass - its not really a super high fidelity picture....but just describing what i appear to see.

if its sun bleach, then you would need to remove the glass and see how much you would need to sand into the wood to get the original colors.....

i still think its looks great.  my olderst boat is approaching 26 years....the color of its okoume has changed over time....but it still looks nice....

let us know what you find out with your experiments.

h

From the photo, it doesn't appear that you have a glass issue. If the wood has faded from the sun, you will need to test different amounts of sanding until the desired color is achieved (not the one about losing ½ to 1 mm of thickness mentioned above). If the varnish is the problem rather than the underlying wood, glass stripping may not be necessary.

https://www.dropbox.com/scl/fi/glz66jtxmii4lxf2b144a/6.26.08-008.jpg?rlkey=6ioiux5t5r8yon0z7oqaj5lsr&st=ym6wr0mm&dl=0happy wheels