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18 messages

Spot refinishing guitar soundboard

22 May 07 - 09:39 PM (#2058795)
Subject: Spot refinishing of a bass guitar soundboard
From: GUEST,TIA

Okay, so I've got this great acoustic bass. And, I've got an insane, neurotic cattle dog who insists on being loved while I am playing. Cattle dog paws the bass and makes three nice scratches (in the finish only, not the wood beneath). Is it possible to sand them out and refinish just this spot? How heavy a cinderblock, and what length of rope do I need for the cattle dog? Anybody have some tips? Thanks.


23 May 07 - 04:29 AM (#2058811)
Subject: RE: Spot refinishing of a guitar soundboard
From: Richard Bridge

On a good guitar this is not a DIY job.


23 May 07 - 08:31 AM (#2058945)
Subject: RE: Spot refinishing of a guitar soundboard
From: GUEST

A complete answer would be a book, not a quick comment.
A lot depends on what the finish is, French Polish, Oiled, Polyurethane Varnish, Cellulose, Acrylic etc. etc.
The only thing I would recommend you try before you get professional help would be a gentle rub over with a car type rubbing compound- T Cut or similar.
If it needs more than that, it's beyond amateur repair
Cheers
Dave


23 May 07 - 08:36 AM (#2058948)
Subject: RE: Spot refinishing of a guitar soundboard
From: Mooh

Agreed.

A look at www.frets.com might be helpful, Frank Ford is a hero among guitar folk.

If the scratches are fairly light, they might just buff out. Find a local luthier for advice and service. I've a frined who builds for a living and he's done exactly this repair for me a couple of times as I don't have a buffing wheel.

As for the dog, you're on your own with training.

Peace, Mooh.


23 May 07 - 09:37 AM (#2058990)
Subject: RE: Spot refinishing of a guitar soundboard
From: Peace

Take it to a pro.


23 May 07 - 09:47 AM (#2058993)
Subject: RE: Spot refinishing of a guitar soundboard
From: Dave Hanson

Just leave them as honourable battle scars.

eric


23 May 07 - 11:01 AM (#2059053)
Subject: RE: Spot refinishing of a guitar soundboard
From: EBarnacle

DO NOT USE POLYURETHANE! Is that loud enough? Polyurethane may look good initially but, when it fails, all of it will have to be removed, usually by mechanical means--sanding, heat gun, etc. If you must remove the varnish, use a good urethane free spar varnish which can be removed by varnish remover or alcohol.


23 May 07 - 02:35 PM (#2059190)
Subject: RE: Spot refinishing of a guitar soundboard
From: Richard Bridge

Well thank you Jecknik, but what will it do for the finish on my soundboard?


24 May 07 - 10:50 AM (#2059882)
Subject: RE: Spot refinishing guitar soundboard
From: GUEST,TIA

Thanks for the good advice and links. Perhaps the best advice is that it is not DIY. So, of course, that is the advice I will ignore. Gonna take a stab at it (done a lot of woodworking and furniture refinishing in my day, and actually have a buffer).

Tested a bit of lacquer on one of the scratches, and it did not bubble the existing finish, and dried completely invisible.

Plan is to sand out scratches (luckily, they don't make it into the wood). Many coats of lacquer with steel wool between. Wet sand down to 600 grit, then buff with white rouge. Basically, I'll get it really mucked up, then take it to a pro.

Thanks again people.


24 May 07 - 11:52 AM (#2059915)
Subject: RE: Spot refinishing guitar soundboard
From: Jim Lad

Allow me to reiterate.
Please, please please leave it alone.


24 May 07 - 11:57 AM (#2059920)
Subject: RE: Spot refinishing guitar soundboard
From: Richard Bridge

You will want down to at least 2000 grit. Trust me, I worked in a car bodyshop for a summer when I was a student....

It is a big risk. But if you are determined to risk it (and you run the risk of turning a $50 job for a pro into a $500 job for a pro) then...

Try this first:

If the scratches are not through the existing finish, try polishing with brasso or non-chemical silver polish, and you may get most of the roughening to disappear.


24 May 07 - 01:08 PM (#2059986)
Subject: RE: Spot refinishing guitar soundboard
From: Bert

Don't WORRY about it!!!


24 May 07 - 01:38 PM (#2060013)
Subject: RE: Spot refinishing guitar soundboard
From: GUEST,TIA

Thanks Richard. That is advice I will take.


24 May 07 - 01:43 PM (#2060017)
Subject: RE: Spot refinishing guitar soundboard
From: Jim Lad

"Thanks Richard. That is advice I will take."

"Trust me, I worked in a car bodyshop for a summer when I was a student...."

I'm trying awful hard to follow the logic here.

Please, allow me to re-irritate.

At least take it to a body shop!


24 May 07 - 02:07 PM (#2060033)
Subject: RE: Spot refinishing guitar soundboard
From: GUEST,TIA

It's not necessarily logic. It's ambition. Perhaps even hubris. Your concern is duly noted, and possibly entirely justified. As I said above, the very best advice is often not followed.

Perhaps I will post the results so that someone (not sure who) can enjoy a good "I toldja so".


24 May 07 - 03:11 PM (#2060088)
Subject: RE: Spot refinishing guitar soundboard
From: Jim Lad

That, my dear, is what we're trying to avoid.
Good luck.


24 May 07 - 03:35 PM (#2060109)
Subject: RE: Spot refinishing guitar soundboard
From: GUEST,TIA

I understand that. And, you probably are right. I simply tend to believe that I can do something until experience (and rarely warnings) prove otherwise -- as has certainly happened in the past, but not to the point of my death yet. Anyhow, thanks.


24 May 07 - 04:55 PM (#2060177)
Subject: RE: Spot refinishing guitar soundboard
From: GUEST,van lingle

Well, if your home repair doesn't work out at least you're on your way to having your own "Trigger", like Willie.