Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sat Nov 30, 2024 9:54 pm


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Thu Aug 27, 2020 4:03 pm 
Offline
Contributing Member
Contributing Member

Joined: Sun Jul 24, 2005 7:12 am
Posts: 713
Location: United States
I wanted to try a very thin, semi-open pore finish on a mahogany parlor body. I filled the pores with 1 coat of Stewmac's Colortone powdered pore filler, sanded it back and cleaned with a damp cloth. The next day, I stained the mahogany with Mohawk Ultra Penetrating stain. The next day. I sealed with Mohawk Vinyl sealer, sanded it smooth, and then put 2 thin coats of Mohawk clear satin nitro. The finish now looks and feels almost the way I want it to, except I want to make it feel a little smoother. Even though I filled the pores, they still show thru the finish, just the way I want them to. There are no finish flaws, drips, or runs, etc that need leveling. I don't want to do any sanding, for fear of white sanding residue getting in the pores. I don't want to use any compound for the same reason. I am thinking of using 0000 steel wool and Mohawk's Wool Lube for smoothing it out some. Anyone have any experience with this product, or a better method to do the final treatment/rub out on the finish? Here are 2 pictures at different light angles.
Attachment:
IMG_6885.jpg
Attachment:
IMG_6884.jpg


You do not have the required permissions to view the files attached to this post.


Last edited by guitarjtb on Thu Aug 27, 2020 6:46 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Thu Aug 27, 2020 5:25 pm 
Offline
Cocobolo
Cocobolo

Joined: Thu Jul 28, 2016 12:35 pm
Posts: 124
First name: Hans
Last Name: Mattes
City: Petaluma
State: CA
Zip/Postal Code: 94952
Country: United States
Focus: Build
Status: Amateur
I've never achieved a truly smooth-to-the-touch finish without a final light sanding, and I've tried all types of "plastic steel wool." But the sandpaper needn't be coarse; a gentle brush using 1500 grit to 2000 grit, backed by a foam covered sanding block, makes a big difference. And a wipe of a naptha-moistened paper towel takes care of the sanding dust. Try it on a piece of scrap; I think you'll find that it works.



These users thanked the author Hans Mattes for the post (total 2): guitarjtb (Fri Aug 28, 2020 12:14 pm) • Pmaj7 (Fri Aug 28, 2020 1:36 am)
Top
 Profile  
 
PostPosted: Thu Aug 27, 2020 5:40 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sun Mar 30, 2008 8:20 am
Posts: 5968
The wool lube and steel wool should make it smooth to the touch and give it a low luster. 000 steel wool might work a little faster but 0000 will work and might give a nicer finish. I've have the Mohawk wool lube but it's probably the same as the Behlen product.



These users thanked the author Clay S. for the post: guitarjtb (Fri Aug 28, 2020 12:14 pm)
Top
 Profile  
 
PostPosted: Thu Aug 27, 2020 6:33 pm 
Offline
Contributing Member
Contributing Member

Joined: Sun Jul 24, 2005 7:12 am
Posts: 713
Location: United States
Clay S. wrote:
The wool lube and steel wool should make it smooth to the touch and give it a low luster. 000 steel wool might work a little faster but 0000 will work and might give a nicer finish. I've have the Mohawk wool lube but it's probably the same as the Behlen product.


Yes, it is Mohawk. I edited my original post.


Top
 Profile  
 
PostPosted: Sat Aug 29, 2020 5:27 am 
Offline
Koa
Koa

Joined: Sun Apr 25, 2010 4:46 pm
Posts: 527
First name: Mark
Last Name: McLean
City: Sydney
State: New South Wales
Zip/Postal Code: 2145
Country: Australia
Focus: Build
Status: Amateur
The finish looks good, and seems to be achieving what you wanted. You could stop now, but I would be concerned that it is still too thin. Two thin coats of nitro is a lot less than most people would consider adequate to get a lasting coating. The danger is that such a thin coating won’t last long and will wear through on areas subject to friction. Most people would think that 6-8 coats is more like a workable finish coating. I would add at least a couple more coats. If you do the steel wool treatment after the final one you should still end up with the satin sheen that you are after.


Top
 Profile  
 
PostPosted: Sat Aug 29, 2020 9:04 am 
Offline
Contributing Member
Contributing Member

Joined: Sun Feb 17, 2013 4:58 pm
Posts: 1449
First name: Ed
Last Name: Minch
City: Chestertown
State: MD
Zip/Postal Code: 21620
Country: United States
Focus: Build
Status: Amateur
I would love to know how Burton LeGeyt gets this finish on his necks and is able to keep the ebonizing in good shape


You do not have the required permissions to view the files attached to this post.



These users thanked the author Ruby50 for the post (total 2): guitarjtb (Sat Aug 29, 2020 7:39 pm) • Pmaj7 (Sat Aug 29, 2020 12:01 pm)
Top
 Profile  
 
PostPosted: Sat Aug 29, 2020 7:22 pm 
Offline
Koa
Koa
User avatar

Joined: Fri Jun 22, 2007 11:14 am
Posts: 1028
Location: Newland, North Carolina
First name: Dave
Last Name: Ball
I know it's too late for this build, but the process that was laid out in the old Luthiers Mercantile "Handbook and Catalog" for open pored finishing using oil (Tru Oil in particular) works great. I've used it on multiple builds, and with Tru Oil, it's easy to get a glossy closed pore finish or a satin open pore finish or most anything in between. It requires a lot more work in surface prep prior to applying the finish beyond what it takes for nitro or varnish or shellac, but is worth the extra effort in the great finish that can result if done right.

I don't know if there's an online version of this or not, But the article was called "Fine Oil Finishes for the Instrument Builder" by Bill Woods. It was included in the 90's versions of the LMI catalog.

In a lot of ways, those old LMI catalogs were the predecessors of web based info sources like this forum. It would be great if LMI were to publish an online version of their old catalog. Lots of great info there, written by a lot of very inspired folks.

Dave



These users thanked the author ballbanjos for the post: guitarjtb (Sat Aug 29, 2020 7:38 pm)
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: doncaparker, SkinnyJim and 58 guests


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

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com