Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Mon May 19, 2025 2:24 pm


All times are UTC - 5 hours





Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject:
PostPosted: Sun Feb 18, 2007 3:32 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
I am endlessly frustrated by the finishing process. Last time I gave up - literally could not get it done.

The basic problem is this - It seems no matter what I do I ALWAYS sand through the finish somewhere. Usually it is the sides where a shoulder or bout corner will show epoxy under the finish but even the top and back can reveal the problem.

This morning with the Crysta-Lac finish same thing. Looking good then BAM that little dull area that shows and hours of work out the window and back to multiple coats and waiting and drying and next week if I'm lucky I will have enough time to try again until I sand through again and the all over again.... Like I said I quit the last time (I had to go to work and get on with my life) but am determined to try another way - HELP

Like I said I am using Crysta Lac and applying with a foam brush and the finish goes on pretty well - about 5-7 coats. I can only level so much because any kind of sanding block will certainly burn through.

Doing everything by hand, including polishing and am worn out from the effort. Only now to have to start all over again.

Maybe it starts with the application?

Need help.

Larry

_________________
Thank You and Best To All


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 4:25 am 
Offline
Contributing Member
Contributing Member

Joined: Thu Dec 14, 2006 6:44 am
Posts: 319
Location: Canada
First name: Ron
Last Name: Belanger
Focus: Build
Status: Semi-pro
Hi Larry,
I know how you feel. I had the same problems until I started spraying. Regardless of how careful I was, the finish was never really even and I sanded through, usually in the spots you mention. However, being the lazy sot that I am I never refinished (except for once). I used KTM 4 and now 9.
I usually used thin CA, applied with a Q tip, a few coats and then leveled and polished it with micromesh 3000 to 12000. I have also had success with french polishing small areas as well.
I am interested in other fixes that have been used.


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 4:54 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
So should I quit whining and just start over? Or is there a trick or technique I might know about?

_________________
Thank You and Best To All


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 5:59 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Oct 06, 2005 1:05 pm
Posts: 3350
Location: Bakersville, NC
Focus: Build
Status: Professional
I would suggest applying a few more layers of finish before sanding. You can apply or spray a coat, wait an hour or so and spray another and so on.... I would do 5 or six per day depending on how thick it goes on, then level sand 24 hours after the last coat. repeat for 5-6 days and let cure 2-4 weeks.

Maybe you are building enough finish on the guitar and then its easily getting sanded through...

_________________
Peter M.
Cornerstone Guitars
http://www.cornerstoneukes.com


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 6:00 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Oct 06, 2005 1:05 pm
Posts: 3350
Location: Bakersville, NC
Focus: Build
Status: Professional
I would suggest applying a few more layers of finish before sanding. You can apply or spray a coat, wait an hour or so and spray another and so on.... I would do 5 or six per day depending on how thick it goes on, then level sand 24 hours after the last coat. repeat for 5-6 days and let cure 2-4 weeks.

Maybe you are not building enough finish on the guitar and then its easily getting sanded through...

_________________
Peter M.
Cornerstone Guitars
http://www.cornerstoneukes.com


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 6:30 am 
Offline
Koa
Koa

Joined: Mon Jul 11, 2005 5:17 am
Posts: 1017
Location: United States
City: Tyler
State: Texas
You may be sanding too hard, or using too coarse a grit of paper. I use 800 or 1000 grit (usually wet) and only sand hard enough to get the finish flat (remove orange peel or brush marks and grit). I haven't used waterbourne finish in a long time, but 800 works for me with nitro.


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 7:51 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Wed Jun 22, 2005 10:11 am
Posts: 2761
Location: Tampa Bay
First name: Dave
Last Name: Anderson
City: Clearwater
State: Florida
Zip/Postal Code: 33755
Country: United States
I recommend getting a compressor and gun as soon as you can.I tried using aresol cans on my first and it was just too thin.I found a good used 15 gal, 4 hp. compressor and gun at a local pawn shop for 125 bucks and it works great.It sounds like you are not getting enough finish on.

_________________
Anderson Guitars
Clearwater,Fl. 33755


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 11:18 am 
Offline
Koa
Koa

Joined: Fri Sep 30, 2005 10:33 pm
Posts: 954
Location: United States
I too would suggest applying 3-4 more coats of finish before sanding/buffing, you can always take some finish off with the sandpaper and buffer, but trying to go too thin from the start can be a real pain as you already know.

Greg

_________________
Gwaltney Guitars


Top
 Profile  
 
 Post subject:
PostPosted: Sun Feb 18, 2007 11:47 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Jan 03, 2006 1:47 pm
Posts: 1624
Location: United States
First name: Larry
Last Name: Hawes
Focus: Build
Status: Amateur
Thanks guys. Seems my process is the same as most who have posted, except for those who spray nitro, so I'll just put more on and get back to sanding.

Larry

_________________
Thank You and Best To All


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 46 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