Primitive Archer

Main Discussion Area => Bows => Topic started by: organic_archer on March 02, 2021, 08:27:51 pm

Title: Burnishing - Pros and Cons?
Post by: organic_archer on March 02, 2021, 08:27:51 pm
I think I’ve only burnished a whole selfbow once my life, but working a hackberry stave this week that’s a touch less dense than some of the others. I can tell it would be more prone to dents and dings if left as is.

Any die-hard burnishers out there doing it to every bow? I would really love to hear everyone’s thoughts on the pros and cons. Lastly, what’s your go-to burnishing tool?

Edit : The newest thread I could find in the archives was 2013. Reopening the conversation because it seems like a lot changes in the bow world and crafting opinions in that amount of time!
Title: Re: Burnishing - Pros and Cons?
Post by: Pat B on March 02, 2021, 09:13:05 pm
I've never burnished a bow but often wondered it scraping a bow doesn't also burnish it behind the scraper's edge.
 I can see your point about burnishing softer woods like hackberry to help prevent dents and dings.
Title: Re: Burnishing - Pros and Cons?
Post by: Selfbowman on March 02, 2021, 09:26:52 pm
I always burnish the back edges and back if it’s flat enough. I use a shaft tamer. But deer horn or bottle will work fine. Even on Osage. 
Title: Re: Burnishing - Pros and Cons?
Post by: PatM on March 02, 2021, 09:56:09 pm
I like to burnish backs at least.  Seems to minimize  damage from dents if the whole surface is pre-dented.
Title: Re: Burnishing - Pros and Cons?
Post by: Bob Barnes on March 03, 2021, 12:02:10 am
This is an interesting thread.  I have friends that have been building bows for decades that burnish every bow.  I have never burnished one.  It always seemed to me like burnishing might compress the wood's cells...kinda like the compression that causes some set..?  Maybe that would be a reason to only burnish the back and not the belly...I have no idea, and will be following this.   :OK
Title: Re: Burnishing - Pros and Cons?
Post by: bownarra on March 03, 2021, 03:00:25 am
I've never burnished a bow but often wondered it scraping a bow doesn't also burnish it behind the scraper's edge.
 I can see your point about burnishing softer woods like hackberry to help prevent dents and dings.

You would have to have a mighty dull scraper to do that! A good scraper will 'wipe' shavings off with virtually no pressure :)
Burnishing isn't going to harm anything especially with a softer wood, why not.
Title: Re: Burnishing - Pros and Cons?
Post by: BoltBows on March 03, 2021, 06:03:04 am
Interesting question! Unfortunately I don't know the answer. I've burnished a few selfbows, but wouldn't be able to tell any difference.
I could imagine that a uneven burnish would be worse that none at all, but again this is speculative.
But burnishing shouldn't be harmful as the wood fibers aren't teared.
There's a technique to repair cracks in instruments like double basses, where you carefully hammer down a thin piece of poplar so it fits in the rift. Then soak it in thin hide glue and the poplar will expand and the crack is gone. Quite extraordinary to see!

Cons: Extra work and I doubt it changes much.
Title: Re: Burnishing - Pros and Cons?
Post by: Eric Krewson on March 03, 2021, 08:57:51 am
I burnished them early on because that was what I read one was supposed to do. I  quit burnishing about 20 years ago and decided it was one of those old wives tails passed down from bow maker to bowmaker that wasn't necessary.
Title: Re: Burnishing - Pros and Cons?
Post by: Selfbowman on March 03, 2021, 09:15:09 am
It does not add any performance. What I think it does is compress the edge grain so when the limb is reduced in width and you have grain run out , it helps prevent edge splintering. Also around knots so they have less tendency to raise. That’s all.
Title: Re: Burnishing - Pros and Cons?
Post by: Eric Krewson on March 03, 2021, 03:12:37 pm
My dad died at 100, he said back in the day there was a ham bone hanging by a cord in dugout for players to burnish their bats on, apparently this procedure was lost in time.
Title: Re: Burnishing - Pros and Cons?
Post by: PatM on March 03, 2021, 04:22:07 pm
My dad died at 100, he said back in the day there was a ham bone hanging by a cord in dugout for players to burnish their bats on, apparently this procedure was lost in time.

 It's actually still done to a degree.  The switch from Ash to Maple killed it off a bit, plus bat companies now take steps to  do a similar treatment before the bat reaches the players.

 
Title: Re: Burnishing - Pros and Cons?
Post by: HH~ on March 03, 2021, 05:59:46 pm
Rub oil and wax in first, does not take well after rubbing the old whisky over it.

HH~
Title: Re: Burnishing - Pros and Cons?
Post by: George Tsoukalas on March 03, 2021, 06:38:33 pm
I used to but don't anymore.  I you do stain first because the cells get compressed and don't allow the stain to penetrate. Jawge
Title: Re: Burnishing - Pros and Cons?
Post by: Digital Caveman on March 03, 2021, 07:09:50 pm
I used to but don't anymore.  I you do stain first because the cells get compressed and don't allow the stain to penetrate. Jawge

Figured that out the hard way.  I burnish if I feel I sanded over to many pin knots, but otherwise it just depends.
Title: Re: Burnishing - Pros and Cons?
Post by: George Tsoukalas on March 04, 2021, 10:41:47 am
I figured it out the hard way too. LOL. :) Jawge
Title: Re: Burnishing - Pros and Cons?
Post by: Dances with squirrels on March 04, 2021, 12:53:58 pm
All I burnish are cabinet scrapers and the blade in my Bowyer's Edge.
Title: Re: Burnishing - Pros and Cons?
Post by: Pappy on March 05, 2021, 08:40:29 am
Usually the edges but not always. Got a smooth,small wine bottle for doing it :)
 Pappy
Title: Re: Burnishing - Pros and Cons?
Post by: bradsmith2010 on March 05, 2021, 02:47:31 pm
I havent burnished any lately, Jim Hamm taught me to burnish the whole bow, but I think i got lazy,,it seems to me like more of a proceedure to respect the wood,, and not sure how effective it is,,
it does look nice on osage,,I dont think it hurts anything,, I think any positive energy directed into the wood is good,,I think its kind of like petting the dog,, does it do any good and for who,,,
Title: Re: Burnishing - Pros and Cons?
Post by: hoosierf on March 12, 2021, 10:10:52 am
I often burnish the bellies on yew. Takes the tool marks out without losing wood.  I usually heat it a bit, strap it to a form and then burnish.  Makes it really shiny and durable. 
Title: Re: Burnishing - Pros and Cons?
Post by: WhistlingBadger on March 12, 2021, 03:00:52 pm
I often burnish the bellies on yew. Takes the tool marks out without losing wood.  I usually heat it a bit, strap it to a form and then burnish.  Makes it really shiny and durable.
I've wondered if it helps keeps dings and scratches out of softwood like juniper or cedar.
Title: Re: Burnishing - Pros and Cons?
Post by: Marc St Louis on March 12, 2021, 06:49:06 pm
I took a look at what burnishing did to the wood under a magnifying glass once.  It lifts a small splinter at the leading edge of the burnish which get flattened down as the tool moves on.  You don't see it it unless you stop and have a good look.  I stopped burnishing after that
Title: Re: Burnishing - Pros and Cons?
Post by: Digital Caveman on March 12, 2021, 07:02:14 pm
What kind of wood was that on?
Title: Re: Burnishing - Pros and Cons?
Post by: HH~ on March 12, 2021, 08:31:57 pm
All scraping or sanding cuts and feather the wood fiber. Laying them down and burnishing them has no ill effect. Take a unburnished bow ready for finish, drop a couple drops of water on a one small spot and wait. Burnish a spot on other limb well, then drop a couple drops there. Watch the effect.
Should make your mind up rather quickly.

HH~
Title: Re: Burnishing - Pros and Cons?
Post by: Sagebrush on March 15, 2021, 01:55:41 am
I burnish the backs of my yew and occassionally my vine maple.  Never on my osage.  This is the way...   :fp
Title: Re: Burnishing - Pros and Cons?
Post by: elijahjmhutchinson on March 15, 2021, 09:40:50 pm
I used to burnish my bows when I was a kid, but I saw no obvious benefit from doing so. I was just following instructions from another bow-maker. I use shellac or poly finish most of the time which adds a good bit of protection. As a side note, some of my early bows showed crystling on the belly side. I can't prove that burnishing was the sole cause of the stress but I think it may have contributed.