Primitive Archer

Main Discussion Area => Bows => Topic started by: jeffp51 on March 20, 2015, 01:01:13 am

Title: covering/sealing sinew backs
Post by: jeffp51 on March 20, 2015, 01:01:13 am
What are some ways to seal/ protect a sinew backing?  snakeskin is one, I know.  Are there any others?  What happens if you put tung oil or tru oil or polyeurethane on it?  The bow is juniper--if it makes it to being a bow.  the sinew has been curing for almost a month, and soon I will start working on it again.
Title: Re: covering/sealing sinew backs
Post by: wizardgoat on March 20, 2015, 01:16:28 am
Tung oil or tru oil is fine, although it's a glossy finish
Title: Re: covering/sealing sinew backs
Post by: mikekeswick on March 20, 2015, 03:38:56 am
Just remember that you can't totally 'seal' it,just slow down moisture transfer. Tung oil will work well.
Title: Re: covering/sealing sinew backs
Post by: PEARL DRUMS on March 20, 2015, 07:35:12 am
Shellac is a great base coat under the tung oil or tru oil.
Title: Re: covering/sealing sinew backs
Post by: PatM on March 20, 2015, 08:15:47 am
Birchbark with extra finish of choice on top of the bark. (http://i399.photobucket.com/albums/pp78/pat_05/IMG_0884.jpg)
Title: Re: covering/sealing sinew backs
Post by: Pat B on March 20, 2015, 08:52:15 am
I've used Tru-Oil, poly and TBIII over sinew as a sealer and over snake skins covering sinew. I use satin poly over Tru-Oil to cut the shine of Tru-Oil.
Title: Re: covering/sealing sinew backs
Post by: bubby on March 20, 2015, 10:23:01 am
Rawhide works great and is easy to paint designs on or stain
Title: Re: covering/sealing sinew backs
Post by: bradsmith2010 on March 20, 2015, 01:44:42 pm
i have used sealer as mentioned above,, and I have painted with acrylic,, and then sprayed with poly,,I think painting gives you a very durable barrier,,,for example if you have tung oil as a finish on a bow,, in hard use,, it will need to be refreshed,, but a good paint job will last for years,,
Title: Re: covering/sealing sinew backs
Post by: jeffp51 on March 20, 2015, 05:46:42 pm
I am trying to decide what will look "right" for the style.  I am not trying to make a replica bow, but the Utah juniper needs a finish that will compliment it properly.  If I were to paint something, it would be very minimal.  I love that birch bark--but it seems to be an eastern style.  I love the suggestions.  I still have some time to think. . .
Title: Re: covering/sealing sinew backs
Post by: bradsmith2010 on March 20, 2015, 06:04:38 pm
well really hard to go wrong with a poly finish,, satin,,,still shows the beauty of the sinew and wood,, I have painted sinew a very neutral color as well,, just depends on how much bad weather you expect to use it in,, I hunted in the rain alot in texas,, so the look was secondary to keeping the sinew dry( i painted the whole bow so there was no seam for water to get in,,,,,but if I was just using in fair weather,,, I would go with what looked the best for sure,, i  just finished a bow for a friend,, and I used archival varnish for oil painting,, on the sinew,, whew that looked nice,, but I dont think it would hold up to bad weather,, it did have uv protection  :)
Title: Re: covering/sealing sinew backs
Post by: Carson (CMB) on March 20, 2015, 07:39:46 pm
I haven't tried it yet, but heavily smoking it, might do well for providing some moisture resistance in combination with another finish.

+1 for shellac as base coat over the sinew.
Title: Re: covering/sealing sinew backs
Post by: JoJoDapyro on March 21, 2015, 10:57:58 am
How about beeswax and lard?
Title: Re: covering/sealing sinew backs
Post by: crooketarrow on March 21, 2015, 11:33:35 am
  Wax is what I seal my personal bows with. I've also covered 3 sinewed bows with wax one with bear grease. What I like about wax every year I redo the wax. I have a new looking bow each time.

  I also once cover the sinew with cut turtle scales.
  LOOKED KINDA PRIMITIVE,LOOKED GOOD
Title: Re: covering/sealing sinew backs
Post by: jeffp51 on March 21, 2015, 08:20:05 pm
I like the beeswax idea.  Also, what happens if you sand the stuff?  what grit should be used if it works?  My sinewing job is not as pretty as some I have seen here.  I am still new to much of this.
Title: Re: covering/sealing sinew backs
Post by: JoJoDapyro on March 21, 2015, 08:38:16 pm
I wouldn't sand it too much Jeff. Mine isn't smooth either. Maybe with time we will get there.  ;) the stuff I made today seems to be pretty sweet. 3 parts olive oil one part wax. My hands are so smooth now. Lol
Title: Re: covering/sealing sinew backs
Post by: jeffp51 on March 21, 2015, 08:41:17 pm
I was wondering where you had been.  I hadn't heard from you for a while.  the stuff you made--is that for sealing wood, or did you have another purpose for it.  Did you just melt the wax and add the oil?
Title: Re: covering/sealing sinew backs
Post by: PatM on March 21, 2015, 08:52:52 pm
http://www.primitivearcher.com/smf/index.php/topic,43246.0.html
Title: Re: covering/sealing sinew backs
Post by: JoJoDapyro on March 21, 2015, 09:33:12 pm
I melted the wax in a double boiler, and then added the oil. It will solidify the wax a bit so keep heating it until its all liquid. Then let it cool. It will melt again at body temp.
Title: Re: covering/sealing sinew backs
Post by: jeffp51 on March 21, 2015, 11:49:40 pm
Thanks Pat,  I followed that how to, but somehow didn't get the same results.  Still need practice, I guess.
Title: Re: covering/sealing sinew backs
Post by: PatM on March 21, 2015, 11:52:54 pm
Thanks Pat,  I followed that how to, but somehow didn't get the same results.  Still need practice, I guess.
What happened?
Title: Re: covering/sealing sinew backs
Post by: jeffp51 on March 22, 2015, 12:32:29 am
A couple of things.  first I used a wrap made from an old t-shirt cut into a long strip instead of a bed sheet.  It seemed to stick a little, and the glue soaked into the knit instead of weeping through like the buildalong shows.  I also didn't have enough inner tube to do that step right.  I think it will be fine, it just isn't as pretty as yours.  It looks more primitive, maybe.  The reflex seems to be holding, so I am optimistic.  I have since acquired an old bed sheet (wife wouldn't let me use hers for some reason) so the next time may be better.

Does sinew allow a bow to bend further than a self bow would?, or does it just reinforce a weak back?