Step 1
Provide ventilation to the room and extinguish sources of open flame, such as cigarettes and candles--the chemicals you’ll be using are very flammable.
Step 2
Put on a pair of rubber or vinyl gloves to protect your hands from ink stains and from the chemicals to remove the stains. Spray WD-40 directly over the marked area or apply fingernail polish, using a cotton swab or ball.
Step 3
Rub the ink mark with a dry cotton ball or swab (whether you choose to use a swab or ball depends on how big the stain is. For small stains, use the swab--it will be easier to avoid spreading the marker stain).
Step 4
Reapply the fingernail polish remover or WD-40 if necessary. If the ink did not fully come off the first time, leave the WD-40 or nail polish remover on the stain for up to a minute.
Step 5
Rinse the ceramic sink and then wash it with regular detergent or hand soap to remove residue from the stain-dissolving chemicals. Buff the sink dry with a soft towel.