If the stain is still visible, you can use superfine steel wool (number 0000) dipped in liquid wax. Rub the steel wool lightly onto the stained area. The steel wool should remove only a fine layer of the surface. It’s important to be gentle so that you don’t remove too much wood. Wipe away the shavings with a clean cloth.
If you choose to remove the finish using chemical strippers, do the work in a well-ventilated area. They contain very harsh chemicals, such as methylene chloride, which can do serious damage to your eyes, lungs, and skin. Shellac and lacquer can be removed with just denatured alcohol.
As with any other harsh chemicals, be sure that your work area gets plenty of air. Use gloves to protect your skin and wear a mask to protect your lungs. When working with two-part bleach, use separate cloths for each part to prevent the two chemicals from reacting with each other.
