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 Post subject: Pore Filling
PostPosted: Mon Dec 03, 2018 4:35 pm 

Joined: Fri May 11, 2018 4:17 pm
Posts: 38
I know that when you do the pore filling that you do not pore fill a spruce top, or that was what I was told, but can you and why not would you not do that??

 Post subject: Re: Pore Filling
PostPosted: Mon Dec 03, 2018 6:34 pm 

Joined: Thu May 24, 2012 8:03 am
Posts: 1476
Location: Chestertown Maryland
Certain woods don't have open pores. Common hardwoods are maple, cherry, and birch, but none of the softwoods - conifers - have open grain. No need to fill.


Ed M

 Post subject: Re: Pore Filling
PostPosted: Mon Dec 03, 2018 10:02 pm 

Joined: Sun Mar 09, 2014 8:13 pm
Posts: 2392
Some hard woods, like maple and cherry, have such small pores that they don't have to be filled either. You can pretty much see which woods need pore filling. I built a cherry guitar that didn't need pore filling, yet the walnut that I built had huge pores.

 Post subject: Re: Pore Filling
PostPosted: Tue Dec 04, 2018 10:05 am 

Joined: Fri Mar 03, 2006 7:09 pm
Posts: 6344
Location: Hegins, Pa
On spruce , filling is a waist or material. There are no pore for it to fill .
The process for filling is as much technique as it is material. I have used so many fillers in my building history and here is what I learned


if you don't the filler will shrink , the object is to seal the wood , that will help block the pores so the filler will work better


I have used pore o paq from behlen for a long time and have very good success with this product. I would get it in natural and stain it for each application.

my new favorite one is the LMI water based filler. It has ample work time , and does a great job. You can rub it in by hand and unlike other water based fillers it doesn't dry so fast as to make a mess of the job.

Yes this does work the protien in the egg white will adhere with the dust and fill pores.

The best advice I can give is #1 READ THE LABLE #2 Sample the product and your technique.

Martin taught me my process and I do pretty much what they do. Apply let flash and rub it with a wool bonnet on a hand help buffer or hand rub with denium or something rough like burlap.

I do this at least 2 times

STAIN ( minwax brand is also a sealing stain ) I still shoot a coat of sealer over it.

allow a few hr to dry depending on product. Apply filler then seal

If I am using Nitro I hit the sealer in about 10 min with a wash coat of nitro as there is no need to sand a seal coat.

apply finish per instructions or your technique.

learning to do a good finish is often harder than building the guitar.

John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans

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