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Dammit! ..now what?
http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=2560		 Page 1 of 1
Author:  Jimson [ Fri Jul 22, 2005 6:04 am ]
Post subject: 
   I blundered this morning while trimming braces on a spruce soundboard and put a crack in the lower bout - two inches in from the treble side.

   The crack isn't visible from the front - so, I am figuring I can just wick some CA glue into the crack from the back and hope for the best.

   I wouldn't feel too bad - EXCEPT - it isn't mine. It's the top to an LMI OM kit that I am helping someone else 'assemble'. I certainly haven't claimed to be an expert so I will readily confess my carelessness - but, what I DON'T want is to have the crack suddenly become visible a year or more down the road.

   I welcome your thoughts.    
Author:  Brock Poling [ Fri Jul 22, 2005 6:59 am ]
Post subject: 

NO NO NO.... No CA... That will leave a very visable mark. Even if the crack is not all the way through the glue might wick through the remaining fibers. And that will surely leave a mark... (ask me how I know... )

Hide glue is a good choice, but if you are not comfortable with that then I would use LMI white. It will be much less visable -- probably in your case invisible.

Good luck.   
Author:  Don Williams [ Fri Jul 22, 2005 7:20 am ]
Post subject: 
To add to that, use hyde glue, and patch that spot with a piece of the same spruce running the grain perpendicular to the top's grain. It doesn't have to be thick, say around .10" at most. This should keep it from ever opening up.
Author:  Dave Rector [ Fri Jul 22, 2005 8:13 am ]
Post subject: 
I agree with the hide glue advice that was already given. I cracked one a while back after dropping it on the floor. I used hide glue and rubbed it into the crack with a clean finger and the crack is now invisible.
Author:  Sprockett [ Fri Jul 22, 2005 10:32 am ]
Post subject: 
I'll make it three.... DO NOT USE CA!!!

Use some fresh thin hot hide glue with a very smalol patch, rub or wick it in and hold the piece tight for a couple of minutes and then let it dry overnight...

CA will leave a mark in Spruce..

Good Luck...

-Paul-
Author:  Jimson [ Fri Jul 22, 2005 5:03 pm ]
Post subject: 
Wow, I am so glad I asked!

I'm a real fan of CA but experienced opinions are what I hoped for - and you guys came through - again.

Thanks much.
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