Drywall formula pore filler

[Tim Benware]

yep a coat of the vinyl sealer goes down before any pore filling

I use it before and after pore filling.

[Kevin in California]

yep before and after

[Herman]

For sake of the durable topcoat that does not crack a bit more flexabel layer would be a good idea.
The industrial polyurethane finishes are not as hard as laquer. Still a major league of the guitars are finished with that. Maybe I worry to much about the subject. But if you have no absolute guidelines, I guess you have to go with general ideas and gut feeling.

[Herman]

Finished the filling of the body.
I still am positive about this plaster filling. I used shellac sanding sealer before and after. The wood has not been stained!. Great.
The sanding was really easy with even 400 grit. Very nice smooth surface IMHO.

[Scott Durham]

"I use it before and after pore filling."

Do you all mean that vinyl sealer should be used before Z-Poxy?

I wonder the purpose since most of the Z-Poxy or other filler will be sanded away.

[ken cierp]

Do you all mean that vinyl sealer should be used before Z-Poxy?

Sealer is only necessary if using a pore filler that is water based or one that has a dye or stain in it. The sealer helps prevent raising the grain or adding unwanted color.

There is no shellac to be found in our shop -- in my experience modern coatings are far superior and much more predictable.