Luthier Tips du Jour

Luthier and Instructor Robert O'Brien shows how to pore fill using drywall compound

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Howto & Style

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• luthier
• videos
• guitar
• building
• lutherie
• how
• to
• pore
• fill
• using
• drywall
• compound
• tips
• du
• jour

[danbombliss]

Do you run into issues with the pore filler pulling out? What kind of binder does the dry wall compound have that that doesn't conflict with a Lacquer finish, but keeps it in the pores? Kind of a vague question I suppose, but I didn't hear anything about compatibility. I've been using a Mohawk pore filling product that takes 24 hours to dry/cure to then sand. I'm looking to save time, but don't want to risk pore filler pulling out under my Lacquer.

-Thanks,

Dan

[OBrienGuitars]

@danbombliss No, the pore filler stays in. You need to do a couple of sessions. There are no compatability issues with the dry wall compound as a filler.

[danbombliss]

@OBrienGuitars So if you were going to be spraying a Lacquer finish over this pore filler, do you immediately seal it with a Vinyl sealer right over top before continuing with the lacquer?

Thanks

[OBrienGuitars]

@danbombliss You can use a sealer if you want to and I usually do when using lacquer.

[OBrienGuitars]

@sirgreggins8824 I am unfamiliar with this process.

[sirgreggins8824]

@OBrienGuitars blonde shellac flakes, gum mastic and gum sandarac resins. will rottenstone work as well as pumice for this process

[OBrienGuitars]

@sirgreggins8824 I am not sure what is in their violin varnish solvent. I would use alcohol.

[sirgreggins8824]

i know that people often use shellac to seal their guitars. french polish method where alcohol and pumice/rottenstone are used to pore fill. 4f pumice or rottenstone? also i do topcaots of behlens violin varnish and behkol solvent is used to thin it. Will this work on the shellac alone, as well?

[OBrienGuitars]

@cowdudeable The Transtint brand is concentrated and a little bit goes a very long way! The quart size was less concentrated and I got it at a finishing supply warehouse. Black later paint would also work but you would probably need more of it to get a true black. Don't forget to do test pieces first!

[cowdudeable]

I am still curious about the Transtint pore filler dye. As I see on line that it coats $19 for 2 oz(!) where did you buy it by the quart? Would black latex paint work as a drywall joint compound stain?