Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Thu Mar 28, 2024 10:02 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 63 posts ]  Go to page Previous  1, 2, 3
Author Message
PostPosted: Wed Jun 06, 2018 9:04 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri May 18, 2012 8:35 pm
Posts: 2658
Location: Austin, Texas
First name: Dan
Last Name: Smith
City: Round Rock
State: TX
Zip/Postal Code: 78681
Country: USA
Focus: Build
Status: Amateur
Maybe this will help


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

_________________
wah
Wah-wah-wah-wah
Wah



These users thanked the author dzsmith for the post: Conor_Searl (Thu Jun 07, 2018 10:56 am)
Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 1:01 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
As I mentioned earlier when I pull my trigger half way back the regulator at the gun drops down to zero despite air coming out at a seemingly consistent pressure. The moment I let go, the needle jumps back up to reading the same as the regulator at the compressor. The adjustment knob on the side of the gun regulator only seems to do two things; turn air off, or let it go through 100%. There is obviously air coming through at various levels of pressure depending on how I set the compressor, so I think the 0 reading the regulator on my gun gives me when I hold the trigger down is inaccurate. Am I missing something or does it seem like this regulator doesn't work.

As an aside, when I hold the trigger down the compressor regulator drops 10psi. Does it seem safe to assume that if I'm getting the same reading at the gun as the compressor that the pressure at the gun is also dropping 10psi when the trigger is pulled?


Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 2:09 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
This is starting to look better.

More thinning, slower and more consistent passes, works wonder.

I sure appreciate the patience and availability of everyone here.


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


Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 3:11 pm 
Offline
Koa
Koa

Joined: Mon Jul 11, 2005 5:17 am
Posts: 995
Location: United States
City: Tyler
State: Texas
Slick as glass. Congrats, you're on a roll!!


Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 3:43 pm 
Offline
Contributing Member
Contributing Member

Joined: Sat Aug 27, 2011 1:59 pm
Posts: 374
First name: Ken
Last Name: Lewis
City: Mt. Pearl
State: NL
Country: Canada
Focus: Build
Status: Amateur
Looking better for sure. I'm thinking that you maybe don't have a regulator at the gun in your setup. I'll usually crank the one
onboard the compressor up 70- 80psi to ensure enough air volume and use the reg. on the gun to set my working pressure, the only
one that counts. When the trigger is pulled, that's your working presssure, as indicated by gun regulator gauge. Most will look something
like this.


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


Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 5:13 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
Ken Lewis wrote:
Looking better for sure. I'm thinking that you maybe don't have a regulator at the gun in your setup. I'll usually crank the one
onboard the compressor up 70- 80psi to ensure enough air volume and use the reg. on the gun to set my working pressure, the only
one that counts. When the trigger is pulled, that's your working presssure, as indicated by gun regulator gauge. Most will look something
like this.



This is what came with my gun. Is it possible that all it is, is a guage that reads the "standing pressure" or something and not actually a regulator? Seems kind of useless to me.


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


Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 5:20 pm 
Offline
Contributing Member
Contributing Member

Joined: Sat Aug 27, 2011 1:59 pm
Posts: 374
First name: Ken
Last Name: Lewis
City: Mt. Pearl
State: NL
Country: Canada
Focus: Build
Status: Amateur
Looks like a gauge with on off valve(pinch valve maybe) and little filter. No regulator.... I think.



These users thanked the author Ken Lewis for the post: Conor_Searl (Fri Jun 08, 2018 8:45 pm)
Top
 Profile  
 
PostPosted: Fri Jun 08, 2018 11:45 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
So my ultra thinned lacquer levelled itself out nicely, but not without some new hiccups.

I assume sanding between clear coats is okay, as the subsequent coats melt into the previous ones. But I've got some obvious blemishes that I need to deal with, and I'm not sure if I can just level sand them out of the way or if I need to go back to wood. It is only one coat of lacquer.

First there are a few air bubbles, I tried poking most of the big ones with a nail as the lacquer was setting up, but I missed a few.
Attachment:
air bubbles.JPG


Then there were a few drips, and some brush marks where I tried to move some lacquer that was pooling. In the past I've used a razor blade to scrape them level.
Attachment:
drips.JPG

Attachment:
brush marks.JPG


Then there was a little orange peel where the lacquer didn't flow, but I figure subsequent coats will fill those spots.
Attachment:
orange peel.JPG


Lastly, the doozy. There was a drip that came through one of the control holes I assumed it was dry, touched it and it peeled off taking some of the color with it. The wood had been dyed, and I also added some dye to this coat as a toner, to even out the color. Can I drop fill this?
Attachment:
skinned off.JPG


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


Top
 Profile  
 
PostPosted: Sun Sep 23, 2018 7:06 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
So, for those of you interested I never did adequately figure out my spray issues. But I think my biggest problem is a compressor that's on the small side, I found I'd get great even coverage at the beginning of a pass, but by the end of my pass all my pressure would be gone. Arrgh. This coupled with the overall steepish learning curve for spraying in general, waterborn lacquer specifically, a dusty garage, and my general overall impatience I've hung the spray gun up for the time being and settled on brushing the lacquer on with pretty great results. Take a look...


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


Top
 Profile  
 
PostPosted: Sun Sep 23, 2018 10:34 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Aug 19, 2005 4:02 am
Posts: 3227
Location: The Woodlands, Texas
First name: Barry
Last Name: Daniels
You might want to fill the pores on the next one.


Top
 Profile  
 
PostPosted: Sun Sep 23, 2018 11:29 pm 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
Yeah I did end up filling the pores. Those other pictures are from a previous attempt. I sanded it all back to wood and started over after I took those.


Top
 Profile  
 
PostPosted: Mon Sep 24, 2018 7:50 am 
Offline
Koa
Koa
User avatar

Joined: Tue Feb 26, 2008 6:19 am
Posts: 1322
First name: Richard
Last Name: Hutchings
City: Warwick
State: RI
Zip/Postal Code: 02889
Country: United States
Focus: Build
Status: Amateur
This is encouraging. Your brushed finish turned out excellent. Probably a little more elbow grease required but no expensive noisy compressor. That's awesome! I've got to try it.

_________________
Hutch

Get the heck off the couch and go build a guitar!!!!


Top
 Profile  
 
PostPosted: Mon Sep 24, 2018 8:59 am 
Offline
Koa
Koa

Joined: Fri Feb 10, 2017 11:09 pm
Posts: 870
Location: Cowichan Valley, BC, Canada
First name: Conor
Last Name: Searl
City: Duncan
State: British Columbia
Zip/Postal Code: V9L 2E5
Country: Canada
Status: Semi-pro
banjopicks wrote:
This is encouraging. Your brushed finish turned out excellent. Probably a little more elbow grease required but no expensive noisy compressor. That's awesome! I've got to try it.


That’s what I thought too. I was toughing my way through the spray learning curve because I figured that’s just what you have to do, but I was so frustrated. I will come back to it, once there aren’t learning curves every step of the way. :D

With brushing I found you definitely have to babysit it a little bit, especially any contoured parts and it’s not as efficient. I’d do a section wait a half hour, turn it on it’s side do another section, etc. But I didn’t find it to be to much more elbow grease, the water based lacquer I used, thinned appropriately, levelled itself out so nicely. There were a lot of air bubbles that would rise after brushing it on, but I used a trick a friend taught me, as the lacquer began to settle I’d hold my brush at 90 degrees to the surface and gently run it along the length of the piece, it would get rid of practically all the bubbles. And I was able to do it all in the comfort of my lesson studio/workspace. Put some tunes on, and putter away at other things while I’d wait for a surface to set up.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 63 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 5 hours


Who is online

Users browsing this forum: Marcus and 43 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