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Expert's Corner — dissolves

TIP: Stains can change color over time

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Many, probably most, store-bought stains are made with both dye and pigment. If wood stained with these stains is exposed to sunlight or fluorescent light for a while, the dye color will fade away, but the pigment color will remain. The effect is that the stained wood changes color. In the accompanying picture the red dye in this “cherry” stain has faded on the top half (I covered the bottom half) after only a few days in direct sunlight, leaving the color significantly different. It’s definitely no longer cherry color. The fading occurs much more rapidly in direct sunlight than...

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TIP: Wash Off Stripper Wax

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Directions on cans of paint-and-varnish remover instruct to “neutralize” the stripper as a final step. This is misleading and often leads to finishing problems. The instruction is misleading because there is nothing in paint strippers that needs to be neutralized. “Neutralizing” refers to acids and bases, not solvents. What needs to be done with all paint strippers sold in metal cans is remove the wax they contain. Manufacturers add wax to these products to retard evaporation so the stripper remains in contact with the paint or finish longer. This wax will retard the drying and weaken the bonding of most...

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TIP: Alchohol and Lacquer Thinner for Stripping

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TIP: Alchohol and Lacquer Thinner for Stripping

Alcohol dissolves shellac, and lacquer thinner dissolves lacquer. So you can use these solvents instead of paint-and-varnish remover for stripping. The advantage is that you don’t have to then remove the wax residue or dry off the lingering n-methyl-pyrrolidone solvent. The disadvantage is that it’s more difficult to strip complex three-dimensional surfaces. But alcohol and lacquer thinner are easy to use on flat surfaces such as tabletops. Simply wet some rags or paper towels with the solvent and lay them on the surface. Keep them wet by pouring on more solvent until the finish has liquefied and you can wipe...

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