BWCA Feathering the stems Boundary Waters Group Forum: Boat Builders and Repair
Chat Rooms (0 Chatting)  |  Search  |   Login/Join
* For the benefit of the community, commercial posting is not allowed.
Boundary Waters Quetico Forum
   Group Forum: Boat Builders and Repair
      Feathering the stems     

Author

Text

Cloznuff
senior member (85)senior membersenior member
 
03/01/2016 07:36PM   (Thread Older Than 3 Years)
I started doing a little sanding tonight after glassing last week. The stems are a little rough where they are layered. When I feather the edges I start to hit raw glass. I suppose this has to happen when feathering the layers, right? Do you put another layer of resin over this prior to the finish varnish or varnish over the small areas of raw glass?

Thanks
 
      Print Top Bottom Previous Next
HighPlainsDrifter
distinguished member(2361)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/01/2016 09:43PM  

On my Ranger build, I laid several strips of glass cut on the bias (like shingles) over my stems. I did this after I glassed the entire hull. It was an after thought and if I did it again, I think I would lay up my bias strips first and then cover them with a full sheet of glass.

But, regardless of how you do it you have to sand into the glass to feather. When I was satisfied with my feathering, I covered the stem area with epoxy to fill the weave in the bias strips and coat the sanded glass. When you do this, you will probably brush epoxy onto cured epoxy. So, make sure you roughen enough area of the hull to provide tooth for the new epoxy that you are laying down.

I have a picture of my stem before feathering. It looks rough, but when I was done you could not see the layers of bias strips.

stem before feathering
 
Wables
distinguished member(1193)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/01/2016 10:18PM  
I used 3 layers of 4 oz cut on a bias over the main layer. I feathered out with a couple extra coats of epoxy and it turned out great.
 
1JimD
distinguished member(541)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/02/2016 07:07AM  
The best scenario is to lay your bias strips on top of your main cloth.
Feather the edges within about 24 hrs with a scraper. Varnish will cover the bias strip edges. Making them near invisible.
No need for more epoxy.
Lay your bias strips widest one first. I use two.
I do this just after wetting out the glass.
I can testify that this works !

Jim
 
Cloznuff
senior member (85)senior membersenior member
 
03/02/2016 07:50AM  
This is my first build so I'm learning as I go. My bias strips are under the main sheet. I did do a little feathering after the wet out to knock off the bigger nubs at the edges. I realize it would be a bad idea to sand thru the main sheet to get a perfectly feathered edge. I am thinking my feathering won't be perfect but I will end up with some raw fabric showing thru (have already)unless I build up more resin and feather the resin.

 
Cloznuff
senior member (85)senior membersenior member
 
03/02/2016 08:18PM  
Here's a couple of pics of what I'm talking about. On both stems and in 2 places on the hull, I've sanded thru the resin to the glass in small areas. Should I put another coat of resin on?
 
1JimD
distinguished member(541)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/03/2016 08:17AM  
Resin is not necessary, and will not add strength to the thinned areas.
The varnish will cover and make the weave invisible. It amazed me the first time I had this same problem. Clean it good with compressed air, or a good vac.

Jim
 
HighPlainsDrifter
distinguished member(2361)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/04/2016 01:00PM  

Well I will weigh in again. In your #2 of 3 photos, I see a problem that varnish alone will not cure. The spots that are glossy are low areas. You are not done with feathering. If you varnish now and do not fair out the hull, those low areas will always show (given the right light angle). Fair it out, put on a coat of epoxy (not for strength but for filler), sand it, varnish it, and ya got a good job.
 
1JimD
distinguished member(541)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/04/2016 04:21PM  
Since the bias strips are under the main cloth, feathering anymore will thin the main cloth. These pics show why the bias strips
should go on top.
If you are going to put another layer over the bias strips and the main layer. Feather what you have now.
Feathering is better done by scraping than sanding. Sanding creates dust that ends up in the pores of the cloth and resin, and will show up after varnishing.
Epoxy alone will not add strength.

Jim
 
Cloznuff
senior member (85)senior membersenior member
 
03/05/2016 07:19AM  
Thanks fo all the replies guys. Is it ok to put another resin layer down with 80 grit swirl marks or should i go finer? Will the sanding marks show thru the added resin layer?
 
1JimD
distinguished member(541)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
03/05/2016 09:56AM  
I'd go lighter grit.
 
      Print Top Bottom Previous Next