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Refinishing problem --- what caused this?

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Refinishing problem --- what caused this?

#1

Refinishing problem --- what caused this?

Tim Greif - West of Chicago

I'm in the middle of refinishing a 30 year old farmhouse style table. It's constructed of alder. LOML wanted a dark ebony glaze finish for the legs and apron and a natural/golden oak finish for the top. I've finished stripping the top to bare wood and left the old fruitwood stain and oil base poly on the parts to get the glaze treatment. Scuff sanded the parts to be glazed to give it some tooth to adhere. All pieces were done the same. One apron board gave me fits. As I applied the ebony stain, it seemed to instantly dry on just the lower half of the board. All other boards took the glaze just fine, staying somewhat tacky as a glaze instead of being wiped off. The problem area appears to have penetrated the old finish and stained the underlying wood jet black. I wiped the whole board down with mineral spirits to wash off the glaze and what's left is what you're seeing in the pictures. Compare to other boards that took the glaze just fine. After the board dries overnight, I plan to spray a barrier coat of shellac and attempt to reglaze. I'll let you know how that goes. But my real question is what the heck would cause this? It's a first for me.






Re: Refinishing problem --- what caused this?

#2

Looks

Mark Mandell - Gone Round In New Jersey

like an old sealer that hasn't been fully removed. Doubt that MS or other solvent will help. You may have to take a 1/16th or more off the face, either by planer or drum sander, to get to "clean" wood.

Re: Refinishing problem --- what caused this?

#3

Good advice.  Worked fine

Tim Greif - West of Chicago

I have no idea what that contamination was. I sanded the whole board to bare wood and sprayed three light coats of dewaxed shellac as a barrier. It then took the ebony glaze just like the other pieces. After the glaze dries for a few days, I'll coat everything with Minwax poly.

In case anybody wondered, Zinsser's spray can shellac is dewaxed shellac and is perfect for use as a quick apply barrier over stains or other contamination prior to using other finishes if needed.

Re: Refinishing problem --- what caused this?

#4

Glad

Mark Mandell - Gone Round In New Jersey

it worked for you

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