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 Post subject: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sat Feb 08, 2020 2:05 pm 
Tournament Grade

Joined: Sun Mar 30, 2014 9:17 pm
Posts: 215
Location: Dallas/Ft. Worth Metroplex
I am finishing a buttstock and forestock for a pump shotgun. It’s a new 3d party walnut stock. I’ve read how it is best to finish the interior of the stocks. It certainly makes sense to do that to protect from moisture damage.

My questions are:

1. How to apply it? and

2. How to rub the finish to prevent tackiness?

What tools to use for the interior?

Thanks




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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sat Feb 08, 2020 2:15 pm 
Diamond Grade

Joined: Sat Nov 05, 2016 11:45 am
Posts: 1666
I don’t know why tung oil would remain tacky. Brush or wipe it on, it should harden I would think.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sat Feb 08, 2020 2:16 pm 
*Proud to be a*
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Joined: Sat Feb 19, 2005 7:25 pm
Posts: 7745
Location: Louisiana
I've used spray on shellac, taping off the finished areas of the stock/forend and applying a light coat or two. It seals the wood completely and is a lot easier than applying oil by hand.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sun Feb 09, 2020 8:33 am 
Tournament Grade
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Joined: Sat Oct 27, 2007 9:43 pm
Posts: 123
Location: Southern Maine
I agree that Tung Oil should dry tack-free, but I'd wipe it on with a small piece of cloth, not a brush, and would check it 1/2 hour later.

Most "Tung Oil" sold retail today is not "pure" Tung Oil, but it still works pretty well; myself, I prefer to use the satin/low-gloss finish.

Old No7


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sun Feb 09, 2020 6:23 pm 
*Proud to be a*
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Joined: Wed Jul 30, 2003 4:23 pm
Posts: 5585
Location: Brillion, WI-25 mls S of Green Bay
In the past, I have used thinned spar varnish. Today, I would use thinned polyurethane. It would soak into the raw wood better and also reinforce the grain and resist gun oil soaking into end grain more deeply.

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Rollin

Author of "Stock Fitter's Bible, Second Edition," which explains the interrelationships between shooting form, stock dimensions and a shooter's size and shape http://www.amazon.com/Stock-Fitters-Bible-Second-Edition/dp/1451570384


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Sun Feb 09, 2020 9:15 pm 
Tournament Grade

Joined: Sun Mar 30, 2014 9:17 pm
Posts: 215
Location: Dallas/Ft. Worth Metroplex
Thanks for the replies.

However, I’m using pure tung oil. Note the subject title, but no doubt I should have made it clearer. I’m pretty sure that pure tung oil will be tacky if it’s not rubbed in within 30-45 minutes after application. If anyone knows that’s wrong, please set me straight.

All suggestions are greatly appreciated.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Mon Feb 10, 2020 1:24 pm 
Diamond Grade
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Joined: Mon May 27, 2013 7:19 pm
Posts: 1679
Location: Indian Head Country Wisconsin
Not sure why you are stuck on using pure tung oil. Pretty much anything will work and why not go with a generic wiping oil with some hardeners? True oil is tried and true, pretty much at any big box hunting/shooting store and can be applied in thin coats with a soft cotton cloth. Otherwise go to your big box lumbar yard and get a small bottle of Hormer Formbys tung oil with hardeners. Same deal. Lots of thin coats with a soft cotton cloth. If you want deep penetration thin out the wiping oil with a small amount of mineral spirts for first coat or two.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Mon Feb 10, 2020 2:03 pm 
Diamond Grade

Joined: Sat Nov 05, 2016 11:45 am
Posts: 1666
“ Most important, of all the oil finishes, tung oil is the only drying oil that polymerizes 100% (completely hardens). ”

From Wikipedia.


“ The traditional technique for applying pure tung oil is to dilute the oil 1:1 with solvent, then apply a succession of very thin films with a soft, lint-free cloth such as tee-shirt cotton. ”


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Tue Feb 11, 2020 2:10 pm 
Tournament Grade

Joined: Sun Mar 30, 2014 9:17 pm
Posts: 215
Location: Dallas/Ft. Worth Metroplex
McFarmer, are you saying that if I apply a 1:1 ratio of pure tung oil to mineral spirits, it won’t become tacky should I not rub it off?

Thanks again.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Tue Feb 11, 2020 3:09 pm 
Field Grade

Joined: Thu Oct 10, 2019 6:52 am
Posts: 56
Dem-bart continental-style checkering and stock oil is a tung oil based product that works great and it dries hard to the touch in 24hrs or less. I was told by the company that the product is tung oil mixed with japan dryer (which is naptha + cobalt).


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Tue Feb 11, 2020 3:39 pm 
Diamond Grade

Joined: Sat Nov 05, 2016 11:45 am
Posts: 1666
The Rattler wrote:
McFarmer, are you saying that if I apply a 1:1 ratio of pure tung oil to mineral spirits, it won’t become tacky should I not rub it off?

Thanks again.


That is my understanding. Might want to try on some scrap wood first.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Tue Feb 11, 2020 3:45 pm 
*Proud to be a*
*Proud to be a*

Joined: Thu Mar 15, 2007 7:47 pm
Posts: 11196
Location: Coastal NC
The interior wood I apply with my fingers. The butt of the stock and the bolt hole, I use an old oil painting brush. I also apply the oil under the forearm with my fingers, a very light coat. The other members have given you good advice about the wood that can be seen.

I use Tung oil as it comes without thinning it. Give it plenty of time to dry between coats.

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Evan

I’ve learned … That the easiest way for me to grow as a person is to surround myself with people smarter than I am.


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 Post subject: Re: Pure Tung Oil - Finishing Inside of Buttstock
PostPosted: Thu Feb 13, 2020 2:17 pm 
Tournament Grade

Joined: Sun Mar 30, 2014 9:17 pm
Posts: 215
Location: Dallas/Ft. Worth Metroplex
Thanks so much for all of the help and advice.




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