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French Polish Problem

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runamuck

Post subject: French Polish Problem

Posted: Tue Aug 30, 2011 12:20 am

Cocobolo

Joined: Sun Jun 21, 2009 1:08 pm
Posts: 426
First name: jim
Last Name: mccarthy
City: ojai
State: ca
Zip/Postal Code: 93023
Country: usa
Focus: Build

I'm working on a guitar that I'm french polishing. Today, for the first time, I noticed tiny, tiny white specks in the finish
of the cedar top. There are no such specks on the cocobolo back or sides.

At first I thought that the cotton rag I have been using had shed, but since there are no specks on the back or sides I think
that's ruled out.

Any ideas?

It's been in the mid 80s with the RH in the mid 30s so I don't believe the problem is humidity related.

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Elman Concepcion

Post subject: Re: French Polish Problem

Posted: Tue Aug 30, 2011 7:04 am

Mahogany

Joined: Mon Oct 15, 2007 12:45 pm
Posts: 94
Location: Windermere, FL

Are the white specs In the finish or in the cedar?
If in the cedar it is probably mineral deposits.
If in the finish then some kind of contamination > filter your shellac.

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