Fill a large sink with cold water. The colder the better! My end try ended up working with blocks of ice) Do make sure that the sink is not only wide enough to hold the bottle but deep enough to thoroughly submerge it.
Gather your string and wrap a portion of it around the circumference of the bottle. Tie the string together and cut off the excess.
Take the string off the bottle and submerge it into a volume of nail polish remover.
Put the string back around the the bottle and prepare to ignite! So keep the bottle of nail polish away and be prepared for accidental fires.