WWA Info Exchange

For Woodworkers By Woodworkers
It is currently Tue Nov 21, 2017 9:03 am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Finish trouble
PostPosted: Sat Aug 20, 2016 5:06 pm 
Offline
Veteran
User avatar

Joined: Sun Dec 01, 2002 1:01 am
Posts: 1147
Location: Kerrville, Texas USA
My friends in the North West, maybe you can help.
I am using the poly/tung oil/mineral spirits mix to finish some small
boxes and after 24 and 48 hours they have dried(?) to a matt finish.
No shine at all.
Our weather has been rain for a week with humidity. (very unusual here in central Texas)
Is my mix wrong? The tung oil is from Lee Valley the other from the hardware store.
Is it the weather?
Comments and suggestions are very welcome

Duan

_________________
Duan Packard
Kerrville, Texas

dum vivimus, vivamus


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Sat Aug 20, 2016 7:52 pm 
Offline
Veteran

Joined: Sun Feb 21, 1999 1:01 am
Posts: 2421
Location: Rochester MN USA
CLIPPER: A couple of questions: What type of poly did you use in your mix? How many coats have you applied?

_________________
Everything was new once.
newtooth 311
Rochester, MN


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Sat Aug 20, 2016 11:52 pm 
Offline
Veteran
User avatar

Joined: Mon Apr 11, 2005 12:01 am
Posts: 4735
Location: Seattle, WA, USA
Hey Duan,

I would add one more question: Did you wipe off the excess?

High humidity can cause some problems, but usually adding a bit more mineral spirits to the mix will do the trick if you make sure to wipe off the excess and build with thin coats.

Cheers,
Tom

_________________
"There is no path to peace, peace is the path."
Mohandas K. Ghandi
Image


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Sun Aug 21, 2016 1:48 am 
Offline
Veteran
User avatar

Joined: Sat Jan 14, 2006 10:44 am
Posts: 3843
Location: Skagit Co WA
Is your concern over whether or no the finish has 'dried', or that it has a matte finish? If it feels tacky or oily I guess you could say its not dried but I have no suggestions in that regard. However if you're not satisfied with the matte finish, I personally haven't experienced anything but a matte finish using an oil finish.

_________________
Nullum Gratuitum Prandium

Cheers - Dennis


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Mon Aug 22, 2016 4:13 am 
Offline
Veteran

Joined: Fri May 30, 2008 5:41 am
Posts: 1790
As to matte finish, it's the second reason why I do not use tung oil. The first is I can't stand the smell. The final polymer size, says Dresdener, is large enough to scatter light, short of what they put in satin varnish, but perceptible. You want transparency, use a different oil. I like Minwax wipe-on poly, which is a short oil version of what you're using. Oil appears to be modified soy, by odor, and ambers less than BLO.


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Mon Aug 22, 2016 9:23 am 
Offline
Veteran
User avatar

Joined: Sun Dec 01, 2002 1:01 am
Posts: 1147
Location: Kerrville, Texas USA
Sorry it took so long to reply.
I used Minwax poly, and is a year old.
I did not wipe the excess, an oversight and stupid move.
I will try more mineral spirits.
Thanks for the thoughts and reminders to do the whole job.

Yes I have used the wipe on poly and like it but was trying
for a different look and feel.

Thanks
Duan

_________________
Duan Packard
Kerrville, Texas

dum vivimus, vivamus


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Mon Aug 22, 2016 11:19 am 
Offline
Veteran
User avatar

Joined: Mon Apr 11, 2005 12:01 am
Posts: 4735
Location: Seattle, WA, USA
Hey Duan,
If the finish was a year old after opening, then it's possible that you have lost some of the poly resins in either a skin or around the rim of the can. A little loss is no big deal, but after a while, you start to change the composition of the finish.
Cheers,
Tom

_________________
"There is no path to peace, peace is the path."
Mohandas K. Ghandi
Image


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Tue Aug 23, 2016 5:43 am 
Offline
Veteran

Joined: Fri May 30, 2008 5:41 am
Posts: 1790
tms wrote:
Hey Duan,
If the finish was a year old after opening, then it's possible that you have lost some of the poly resins in either a skin or around the rim of the can. A little loss is no big deal, but after a while, you start to change the composition of the finish.


Use the hi-test, not the already dilute Wipe-On if you're going to make a mixed long-oil finish. The hi-test is ~55% solvent, while the wipe-on is ~70%. Presume the remainder is urethane resin.

Use one of the traditional ways of excluding air if you want to preserve the usability. Squeeze bottles, marbles to fill the air space are two methods which work well. It's oxygen that starts the polymerization. Deny it.


Top
 Profile  
 
 Post subject: Re: Finish trouble
PostPosted: Tue Aug 23, 2016 10:12 am 
Offline
Veteran
User avatar

Joined: Sun Dec 01, 2002 1:01 am
Posts: 1147
Location: Kerrville, Texas USA
Thanks for the thoughts and help.
Maybe I should start over with new poly.

Thanks
Duan

_________________
Duan Packard
Kerrville, Texas

dum vivimus, vivamus


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group