Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun Jul 27, 2025 6:44 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Thu Sep 08, 2016 8:38 pm 
Offline
Koa
Koa
User avatar

Joined: Tue Nov 11, 2008 9:13 pm
Posts: 835
Location: Durango CO
First name: Dave
Last Name: Farmer
City: Durango
State: CO
Man, I would much rather open a cool one and type all day on the "Being a hobbyist, and being happy" thread.
Instead, I'm trying to put to bed a long standing down to earth conundrum in my Shop.

Rubbing compounds are expensive. The labels manufactures use I find as useless as the endless anecdotal descriptions about their effectiveness.
I have, and have used, a number of them but not yet found what I am looking for.
I have decided to do some simple testing myself. Based on what I need the product to do.
I welcome any interest or input on where I drop my next dollop of potentially wasted money.

Attachment:
WIN_20160908_12_32_21_Pro.jpg

The best test surface I have. A jet black Epiphone, brick hard poly finish
Matt spots are 3M Imperial 2500 wet sanded w/ soapy water
Attachment:
WIN_20160908_12_48_27_Pro.jpg

Jescar/Menzerna 2500, Jescar/Menzerna scratch and swirl remover, Novus #2
Attachment:
WIN_20160908_12_39_18_Pro.jpg

30 seconds clockwise and 30 seconds counterclockwise with each product

For inaccessible places or times when buffing would highlight touchups I'm looking for something to bridge the gap between the 2500 Imperial scratches and these products.

Any suggestions?
One of the myriad "finesse it" compounds? Novus #3?


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



These users thanked the author david farmer for the post: Hesh (Fri Sep 09, 2016 4:25 am)
Top
 Profile  
 
PostPosted: Fri Sep 09, 2016 1:51 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5583
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Work up through the micromesh grades first before using these products.

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
PostPosted: Fri Sep 09, 2016 3:13 am 
Offline
Koa
Koa
User avatar

Joined: Mon Sep 05, 2011 10:45 pm
Posts: 1484
First name: Trevor
Last Name: Gore
City: Sydney
Country: Australia
Focus: Build
Status: Professional
If you want to finish on 2500 papers I think you'll have to start with a coarser rubbing compound (and then finish with a fine one). Have you tried starting on Farecla G4? It feels like rubbing grit into the surface, but produces quite a good shine. After that, one of the compounds you have should finish the job off.

_________________
Trevor Gore, Luthier. Australian hand made acoustic guitars, classical guitars; custom guitar design and build; guitar design instruction.

http://www.goreguitars.com.au


Top
 Profile  
 
PostPosted: Fri Sep 09, 2016 6:03 am 
Offline
Koa
Koa
User avatar

Joined: Sat Jan 19, 2013 7:33 am
Posts: 1900
First name: Willard
Last Name: Guthrie
City: Cumberland
State: Maryland 21502
Zip/Postal Code: 21502
Country: United State
Focus: Repair
Status: Semi-pro
We wet sand lacquer and polyester/polyurethane through 1200, then medium and fine Menzerna compounds on the big buffer, then 3M 05990 Hand Glaze. For Enduro-Var, we dry sand either with 3M imperial papers or with Abralon/Abranet on an air sander (side/neck versus top/back), then buff and glaze. Seems to provide a swirl and haze free high gloss.

_________________
A constellation only takes shape when one maps the whole.
- Beth Brower


Top
 Profile  
 
PostPosted: Fri Sep 09, 2016 7:03 am 
Offline
Koa
Koa
User avatar

Joined: Tue Nov 11, 2008 9:13 pm
Posts: 835
Location: Durango CO
First name: Dave
Last Name: Farmer
City: Durango
State: CO
I've never heard of Farecla G4. I'll look into it's availability in the states. Thanks Trevor.

Woodie, I use a buffer most of the time. I'm just looking for a relatively quick way to go from wet sanding to final gloss w/out the buffer. In some situations it works better. I have gotten it done for a long time but feel like it has required too much time and elbow grease.
I'm looking for a certain intermediate grit to speed/ease the process.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: ChuckB and 12 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