Use 91% isopropyl alcohol if you can get it. Everclear (95% alcohol) is perfect though expensive. You can buy Everclear at a liquor store. There are lots of others that may work, but they may damage your project.
Everclear is a brand name for rectified spirit, also known as grain alcohol or neutral spirit, produced by the American company Luxco. It's made from grain, typically corn, and bottled at various alcohol-by-volume (ABV) levels.