Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun Aug 03, 2025 7:19 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 22 posts ] 
Author Message
PostPosted: Wed May 04, 2011 7:54 pm 
Offline
Walnut
Walnut

Joined: Sun Mar 27, 2011 2:12 pm
Posts: 8
First name: David
Last Name: Wolfe
City: Fort Lauderdale
State: FL
Zip/Postal Code: 33316
Country: USA
Focus: Build
Status: Amateur
oops_sign I used Zpoxy to fill the pores on my redwood soundboard before I located the fretboard and bridge locations.I have since taped off where they will be mounted to prevent finishing those areas.My question is do I use WEST epoxy to glue the fretboard and bridge in place or try to scrape down to bare wood under the fretboard and bridge and use titebond or LMI white glue


Top
 Profile  
 
PostPosted: Wed May 04, 2011 8:29 pm 
Offline
Koa
Koa
User avatar

Joined: Wed Oct 21, 2009 7:46 pm
Posts: 950
First name: Francis
Last Name: Richer
City: Montréal
State: Québec
Zip/Postal Code: H4G 2Z2
Country: Canada
Focus: Build
Status: Semi-pro
First, you don't need to porefill redwood. If you can find pores there, you have really good eyes...

Second, you definitely want a perfect wood to wood contact when you glue both the fingerboard and the bridge.

_________________
Francis Richer, Montréal
Les Guitares F&M Guitars


Top
 Profile  
 
PostPosted: Wed May 04, 2011 9:20 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Feb 01, 2008 8:47 am
Posts: 1244
Location: Montreal, Canada
Focus: Build
Status: Amateur
Yes, scrape down to bare wood and you'll be fine with titebone (and probably with LMII white as well, although I never used it, so take this for what it's worth...)

_________________
Alain Moisan
Former full time builder of Acoustics, Classicals and Flamencos.
(Now building just for fun!)


Top
 Profile  
 
PostPosted: Wed May 04, 2011 10:14 pm 
Offline
Koa
Koa
User avatar

Joined: Wed Oct 21, 2009 7:46 pm
Posts: 950
First name: Francis
Last Name: Richer
City: Montréal
State: Québec
Zip/Postal Code: H4G 2Z2
Country: Canada
Focus: Build
Status: Semi-pro
Pieces slip more with LMI than with Titebond, you have to be aware of that. Titebond stick quickly, for what I experienced.

_________________
Francis Richer, Montréal
Les Guitares F&M Guitars


Top
 Profile  
 
PostPosted: Wed May 04, 2011 11:58 pm 
Offline
Cocobolo
Cocobolo

Joined: Sun Feb 13, 2005 2:47 am
Posts: 306
Location: Seattle
First name: Rick
Last Name: Davis
City: Seattle
State: WA
Country: United States
Focus: Build
Status: Professional
I use LMI glue for redwood soundboards but I thin it with a couple drops of water (maybe 5%). No problems with about 25 guitars. But I've never used epoxy on a soundboard (why would you?) so YMMV.


Top
 Profile  
 
PostPosted: Thu May 05, 2011 12:15 am 
Offline
Cocobolo
Cocobolo

Joined: Mon Nov 02, 2009 1:34 pm
Posts: 156
First name: Ellison
City: Whitman
State: MA
Focus: Build
Status: Semi-pro
Echo on the pore filling. No need for it. As for glueing, I get great results with LMI white. You definitely want to use a white glue here, and I simply don't trust elmers for a joint like that...


Top
 Profile  
 
PostPosted: Thu May 05, 2011 5:53 am 
Offline
Walnut
Walnut

Joined: Sun Mar 27, 2011 2:12 pm
Posts: 8
First name: David
Last Name: Wolfe
City: Fort Lauderdale
State: FL
Zip/Postal Code: 33316
Country: USA
Focus: Build
Status: Amateur
This is my first guitar build. I bought the kit from LMI and the Robert Obrien DVD, which has been very helpful,in the DVD he put the Zpoxy on his spruce top thats why I did my redwood top. What is the down side of doing that? Thanks for all your replies. idunno


Top
 Profile  
 
PostPosted: Thu May 05, 2011 8:46 am 
Offline
Contributing Member
Contributing Member

Joined: Sat Aug 25, 2007 2:05 am
Posts: 685
Location: Saint Petersburg, Florida
First name: Glenn
Last Name: LaSalle
City: Saint Petersburg
State: Florida
Status: Amateur
John Hall has a couple Youtube videos on glueing the bridge:



Glenn


Top
 Profile  
 
PostPosted: Thu May 05, 2011 9:24 am 
Offline
Contributing Member
Contributing Member

Joined: Mon Jan 03, 2005 7:46 am
Posts: 1315
Location: Branson, MO
First name: stan
Last Name: thomison
City: branson
State: mo
Zip/Postal Code: 65616
Country: united states
Focus: Build
Status: Professional
I do like Rick. You don't need to fill the top. That said, I have with a very thin mix and leveling it for FP. Even for that not needed, but it gave me a good starting point. I haven't used that method in a long time though. I now tend to just slurry fill with shellac (if slurry is a term or word)


Top
 Profile  
 
PostPosted: Thu May 05, 2011 9:53 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Mon Jan 28, 2008 5:21 am
Posts: 4915
Location: Central PA
First name: john
Last Name: hall
City: Hegins
State: pa
Zip/Postal Code: 17938
Country: usa
Focus: Build
Status: Professional
I never use a filler on a top unless it is Mahogany and even then I try and mask off the foot print.

_________________
John Hall
blues creek guitars
Authorized CF Martin Repair
Co President of ASIA
You Don't know what you don't know until you know it


Top
 Profile  
 
PostPosted: Thu May 05, 2011 10:36 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6262
Location: Virginia
I prefer wood to wood contact on the bridge but some people will use CA right to the finish.


Top
 Profile  
 
PostPosted: Thu May 05, 2011 11:24 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Wed Aug 31, 2005 7:30 am
Posts: 1792
Location: United States
jfmckenna wrote:
I prefer wood to wood contact on the bridge but some people will use CA right to the finish.
OK, let's be specific there. Some people, to my knowledge, is only Rick Turner. I know of nobody else successfully doing this.
And he worked out a specific sealer and finish, namely Waterlox and McFadden catalysed urethane if I recall (please correct me if I am wrong), that will not delaminate under string tension. Furthermore, CA cleans up with acetone and only some modern catalysed finishes can take the abuse. Most finishes will be damaged by contact with acetone, and that is especially true of organic finishes like shellac, nitro cellulose lacquer and oil varnish.
Don't even attempt gluing a bridge with CA with any finish unless everything is figured out 100%.

_________________
Laurent Brondel
West Paris, Maine - USA
http://www.laurentbrondel.com/


Top
 Profile  
 
PostPosted: Thu May 05, 2011 11:54 am 
Offline
Contributing Member
Contributing Member

Joined: Mon Jan 03, 2005 7:46 am
Posts: 1315
Location: Branson, MO
First name: stan
Last Name: thomison
City: branson
State: mo
Zip/Postal Code: 65616
Country: united states
Focus: Build
Status: Professional
I am with Laurent here on trying to glue with CA or poxy over a finish. One is asking for a mess. Why do it when a clean and LMI or whatever wood glue use will do the trick and not a problem. Rick is in whole different class than most of us here and in that area. To the good.

I said I only use Z poxy on rare occasion for the top (well for that matter any) finish work now. Those times were when doing a very light and thinned mixture for FP or had some doubts about the top, which if normally I have a doubt I don't use it.

Low and behold this morning I went out and pulled a body to finish up a build. I found over time the seam of the join shows and cracks. I have put cleats on them them and the top is a little thin so used a light coat and thinned mixture. Gave it a little color so will sand it lightly and level then shoot over it. I would normally just redo the top or never have used it in the first place as it is an orphan so to speak, but a give away and will be fine for tone and structure.


Top
 Profile  
 
PostPosted: Thu May 05, 2011 2:07 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Feb 01, 2008 8:47 am
Posts: 1244
Location: Montreal, Canada
Focus: Build
Status: Amateur
Laurent Brondel wrote:
...McFadden catalysed urethane if I recall (please correct me if I am wrong)...


Rick uses polyester (or used to when he was hanging around here).

Here's a link to a very informative thread about it: viewtopic.php?f=10102&t=13299

_________________
Alain Moisan
Former full time builder of Acoustics, Classicals and Flamencos.
(Now building just for fun!)


Top
 Profile  
 
PostPosted: Thu May 05, 2011 3:25 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Mon Jan 28, 2008 5:21 am
Posts: 4915
Location: Central PA
First name: john
Last Name: hall
City: Hegins
State: pa
Zip/Postal Code: 17938
Country: usa
Focus: Build
Status: Professional
There is a big issue here , and that is what are you going to do if you ever got to take off a bridge. Epoxy and you will have to rout off the bridge same with CA. Using a wood glue like tite bond , HHG you can take it off with heat . Trust me wood glue is much better that anything else in my book. I am up to 129 guitars and it works for me.
I have had to do repairs on CA attached bridges. this will about double the cost of bridge work , my 2 cents .

_________________
John Hall
blues creek guitars
Authorized CF Martin Repair
Co President of ASIA
You Don't know what you don't know until you know it


Top
 Profile  
 
PostPosted: Thu May 05, 2011 4:11 pm 
Offline
Walnut
Walnut

Joined: Sun Mar 27, 2011 2:12 pm
Posts: 8
First name: David
Last Name: Wolfe
City: Fort Lauderdale
State: FL
Zip/Postal Code: 33316
Country: USA
Focus: Build
Status: Amateur
I forgot to mention that Robert O'brien did tape off the bridge location before he put the Zpoxy on the top. You learn so much more from your own mistakes than from anything else. I will scrape the epoxy off at the bridge location.

Thanks to all for their help. I appreciate it!!


Top
 Profile  
 
PostPosted: Thu May 05, 2011 9:50 pm 
Offline
Koa
Koa
User avatar

Joined: Wed Jan 24, 2007 2:45 pm
Posts: 1371
Location: Calgary, Canada
Status: Amateur
Didn't Larivee do this as well? I seem to recall a GAL article where he went through gallons of CA including for doing the back seam on EIR.


Laurent Brondel wrote:
jfmckenna wrote:
I prefer wood to wood contact on the bridge but some people will use CA right to the finish.
OK, let's be specific there. Some people, to my knowledge, is only Rick Turner. I know of nobody else successfully doing this.
And he worked out a specific sealer and finish, namely Waterlox and McFadden catalysed urethane if I recall (please correct me if I am wrong), that will not delaminate under string tension. Furthermore, CA cleans up with acetone and only some modern catalysed finishes can take the abuse. Most finishes will be damaged by contact with acetone, and that is especially true of organic finishes like shellac, nitro cellulose lacquer and oil varnish.
Don't even attempt gluing a bridge with CA with any finish unless everything is figured out 100%.


Top
 Profile  
 
PostPosted: Fri May 06, 2011 12:21 am 
Offline
Koa
Koa

Joined: Fri Mar 31, 2006 4:54 pm
Posts: 713
Location: United States
First name: nick
Last Name: fullerton
City: Vallejo
State: ca
Zip/Postal Code: 94590
Country: usa
Focus: Build
Status: Amateur
thanks for the link. Excellent videos. pizza

_________________
"Preoccupation with an effect gives it power and enhances the error"
from "Your Owner's Manual" by Burt Hotchkiss.


Top
 Profile  
 
PostPosted: Fri May 06, 2011 9:23 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6262
Location: Virginia
Ah ok I didn't know that about the special finish required to use CA. I did a repair on a Larivee a few months back and was surprised that the bridge was glued right to the finish, so I would guess that is the method used, and it failed. Like I said, I like wood to wood anyway. It wouldn't be too terribly difficult to scrape off the epoxy would it? IDK cause I never used zpoxy before though I am interested in it.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 22 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