Page 1 of 1

A Bizarre problem

Posted: Wed Feb 08, 2023 10:39 pm
by Diane Kauffmds
I just got a Custom Shop Laravee with a cedar top in the shop. The reason: apparently, the wood is peeling.

At first glance, you'd swear it's pick damage. He doesn't use a pick! I've watched him play and like most of us, he plays below the fretboard, in the usual area. This problem started as a tiny spot above the pickguard. This resulting area is literally scooped out. I actually saw a couple of flakes of wood come off.

You can see where it may be starting on the other side. I told him that the only thing I can think of is to refinish the top. I'm going to remove the pickguard, mask off the bridge and fretboard, sand the top, then I'm french polishing shellac. I know that the shellac will penetrate the wood, locking the fibers together.

At least, that's my theory...

The bad area above the pickguard will stay scooped. The spot is strong; I cannot move it. After sanding the top, I'm going to steam thst area to see if it's just compressed.
image000000(1).jpg
image000000(3).jpg

Re: A Bizarre problem

Posted: Thu Feb 09, 2023 2:48 am
by Stray Feathers
That's bizarre - I would consider contacting Larrivée to see if they have seen this before. Not to do you out of some work Diane, but they might repair it. It appears it was made in Vancouver so over twenty years old. Is there a guitar shop called Wildwood that it was made for? Bruce W.

Re: A Bizarre problem

Posted: Thu Feb 09, 2023 10:20 am
by Diane Kauffmds
Stray Feathers wrote: Thu Feb 09, 2023 2:48 am That's bizarre - I would consider contacting Larrivée to see if they have seen this before. Not to do you out of some work Diane, but they might repair it. It appears it was made in Vancouver so over twenty years old. Is there a guitar shop called Wildwood that it was made for? Bruce W.
He did. They won't fix it. They said it is pick damage. I did a little online research. Laravee was trying to formulate or use a polyurethane, taking out the plastics. I'll have to look at the data. I don't know if this has anything to do with the formula. But, Laravee won't warrant it.

Re: A Bizarre problem

Posted: Thu Feb 09, 2023 1:21 pm
by Morecowbell
That is really strange. Is the finish crazed or cracking anywhere else? Wonder if its some odd reaction between the pick-guard adhesive and the finish? You wouldn't think it would extend that far but maybe the pick-guard had a bunch of squeeze out that was wiped in that direction? But that's really grasping at straws....

How deep is it?

Re: A Bizarre problem

Posted: Fri Feb 10, 2023 1:47 am
by Diane Kauffmds
The finish is very thin for urethane. No cracking or crazing. There may be delamination between the finish and wood; it clouds up before coming off. I think the finish is taking wood with it when it comes off, pulling up the next layer. But, it's supposition at this point. I've not measured how deep that is. I've not started work yet. When I get the pg off I'll take a measurement. I'm guessing at around 0.50-0.75 mm deep. That doesn't sound like much, until you realize that a top is usually around 2.50mm thick. It is definitely too deep to sand out.

I'm going to steam the area after the pg is removed, prior to sanding the top. Maybe some of it has compacted.

Re: A Bizarre problem

Posted: Sat Feb 11, 2023 12:15 pm
by phavriluk
My SWAG: Someone mentioned the finish flaking off and taking the wood with it. That makes intuitive sense to me, coupled with severe runout in the top in that area, which offers up little bits of wood for the departing finish to drag along with the flaking finish.

Re: A Bizarre problem

Posted: Wed Mar 01, 2023 10:26 pm
by Diane Kauffmds
Well. For better or worse, here's the finisher guitar. That area above the pickguard was too deep to sand out. So, it'll be there forever. I did take out a couple of other spots that were starting. But, I have a very happy customer, which is most important.
20230217_112130.jpg