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PostPosted: Mon Dec 01, 2008 8:57 pm 
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Cocobolo
Cocobolo

Joined: Wed Apr 23, 2008 6:58 pm
Posts: 316
I've always put a few coats of shellac on my tops prior to finishing. I sand the whole top pretty thoroughly before spraying, but of course there is a thin film of shellac everywhere, including under the bridge patch. I've never had any trouble with the bridge coming unglued.

On a current build, however, I've put more coats of shellac on than usual, in order to cover up some slight irregularities in the top surface. I'm sanding back significantly, but there is probably more shellac on the surface than usual. Should I be worried about the glue adhering under the bridge, or rather, failing to adhere, and the bridge lifting? Are most folks sanding or scraping all the way back to wood under the bridge patch?

TIA,

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Ken Mitchell
Durham, NC


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PostPosted: Tue Dec 02, 2008 2:03 am 
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Koa
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Joined: Thu Aug 25, 2005 4:49 pm
Posts: 1209
Location: Ukiah, CA
I sand all the way back to wood. Why take a chance?

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Ken Franklin
clumsy yet persistent
https://www.kenfranklinukulele.com


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PostPosted: Tue Dec 02, 2008 9:33 am 
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Contributing Member
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Joined: Sat May 17, 2008 1:11 pm
Posts: 2351
Location: Spokane, Washington
First name: Pat
Last Name: Foster
Country: USA
Focus: Build
Status: Semi-pro
A sharp-corner scraper works pretty well to cut that rabbet, makes it easy to tell how deep I've gone.

Pat

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formerly known around here as burbank
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http://www.patfosterguitars.com


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PostPosted: Tue Dec 02, 2008 12:10 pm 
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Cocobolo
Cocobolo

Joined: Wed Apr 23, 2008 6:58 pm
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Thanks, guys!

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Ken Mitchell
Durham, NC


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