Blk water stains on oak/ash veneer


  #1  
Old 07-19-01, 06:07 AM
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How do you remove black water stains from oak or ash? Piece of furiture is a circa 1950 dual dropleaf dinning table with integral extension leaf,(split in half, spring loaded flip-over style) and is mission style. Its orginal finish is/was blond oak/ash (veenered) with clear lacquer top coat.

It has several, large to small, black stains on the top surfaces. I have already stripped off old finish and lightly sanded. Stains appear to be deep into the wood and range from lite gray to dark black.

I would really like to return this table to it's orginal finish of , natural with white highlites in the grain with lacqured top coat.

Any help or suggestions would be greatly appreciated.

PS. Any tips on applying the new finish would also be appreciated. I am an experienced re-finisher but not a master!
 
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Old 07-19-01, 05:38 PM
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Oxalic acid will remove the water marks. Apply to the entire top, as oxalic acid is a bleach, and while removing the stains will lighten the wood slightly. It should be available at any good paint store and most home centers.

Since it sometimes isn't on the box, here's how you use it. Heat 8 ounces of water to near boiling. Spoon the oxalic crystals into the water (after removing it from heat). Stir the mixture naad keep adding the crystals until they no longer dissolve. Use a clean brush to apply this mixture to the entire surface. You chould see results within 60 seconds. Up to three applicatoins can be made if needed. After that, it's time to clean up. The acid has done everything it's going to do.

Wipe the table down with dry rags to remove dissolved oxalic acid. Wipe iwth wet rags to pcik up anything that might be left, then wipe dry again - all with clean rags. Oxalic acid, if left to dry, will return to its powder form. When you sand, you'll find this powder very irritating to the nose and throat - hence the extra measures at removing as much as you can.

Refinishing tips?

Clean work area - proper surface preparation - proper temperature/humidity for application of the chosen finish - PATIENCE....
 
 

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