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What kind of sanding sealer for flamenco guitar?   You are logged in as Guest
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Armando

Posts: 279
Joined: May 27 2005
From: Zürich, Switzerland

What kind of sanding sealer for flam... 

Hi guys

Just wondering what you guys are using as sanding sealer on classical or flamenco guitars, if any.

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  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 5 2019 13:45:59
 
Tom Blackshear

 

Posts: 1898
Joined: Apr. 15 2008
 

RE: What kind of sanding sealer for ... (in reply to Armando

I use a water based paste from LMI in California. Dries quick and usually takes about 3 light coats with very little sanding.







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Tom Blackshear Guitar maker
  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 5 2019 18:11:15
 
Armando

Posts: 279
Joined: May 27 2005
From: Zürich, Switzerland

RE: What kind of sanding sealer for ... (in reply to Armando

Yes, thanks Tom although i meant for a spruce top. I'm also using that porefiller for rosewood.

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  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 5 2019 20:40:28
 
Tom Blackshear

 

Posts: 1898
Joined: Apr. 15 2008
 

RE: What kind of sanding sealer for ... (in reply to Armando

I use a shellac base, very thin for the top. Usually a couple of thin coats to seal the wood, then apply a thin color with a spray gun, then seal it with some clear coats that are sprayed, before I finish off with my French polish technique.

Take into consideration that most shellac is quite thin compared to Lacquer.

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Tom Blackshear Guitar maker
  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 6 2019 15:14:40
 
Armando

Posts: 279
Joined: May 27 2005
From: Zürich, Switzerland

RE: What kind of sanding sealer for ... (in reply to Armando

Ok, thanks Tom for sharing your technique. I heard of weird things like eggs and other things. I think the surface of the guitar should be hardened to make a good base for the shellac. I had the problem of the shallac not being hard enough to protect the surface from scratches, although it was not actually the shellac that became scratched but the spruce underneath due to rasqueados and golpes regardless of the golpeador. Violin makers have used kali waterglass to harden their soundboards. The problem with this is that it is waterbased and the spruce will absorb too much water that will only evaporate slowly, so it may warp the soundboard. It also adds weight to the top as it is actually kind of liquid glass. Once applied the spruce gains significantly on hardness though but the additional weight is likely not wanted on a soundboard, especially on a flamenco.

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  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 6 2019 19:49:06
 
Andy Culpepper

Posts: 2718
Joined: Mar. 30 2009
From: NY, USA

RE: What kind of sanding sealer for ... (in reply to Armando

You have to be careful with the nylon string guitar not to add anything that will cause too much damping, especially to the soundboard. Violins can tolerate a lot of damping because of the amount of energy the bowed string produces. Actually with violins, some damping is good in order to tame the sound somewhat (as I understand it).
I have seen guitars that had an egg wash of some sort applied and it can work nicely. But a shellac finish is always going to be more prone to scratches and dings than something like lacquer or varnish, just comes with the territory.
  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 6 2019 23:06:00
 
Armando

Posts: 279
Joined: May 27 2005
From: Zürich, Switzerland

RE: What kind of sanding sealer for ... (in reply to Armando

Thanks Andy

Yes, appart of the water base, the mass that it adds is more of a problem than the damping because glass is an excellent transmitter of sound especially for the trebles. I did not use it for the current guitar because it's kind of risky. My soundboard is already on the stiff side not because it is too beefy but because the top has almost no doming which i find restricts it's free movement. So i don't want to add stuff that would enhance the treble response.

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  REPORT THIS POST AS INAPPROPRIATE |  Date Nov. 7 2019 18:17:12
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