Zookyook07-18-2010, 11:05 AMdont mix it with ink, its made specifically to eat away at glass, so glass is the best surface to write on, im not sure if it works with plexiglass or just real glass though...also im not sure where its located in stores but u can get it online (if u have $) ... i say etch works best with mops that dont get super drippy, because if u get that shit on u it burns... basic