The reason Everclear is illegal some places is that it's used in making methamphetamines. I used to work at a liquor store in TX and we had a limit of one bottle per person per day, per state law. People used to walk in, pick it up, and then run straight out of the store without paying. We ended up having to keep it behind the counter.
For the person who asked about using white rum, rum is usually 80 proof and so is regular, cheap vodka...which I use for painting and it works fine. Rum has a flavor and vodka doesn't but I doubt it would leave much flavor behind.