This was my first time using airbrushing. I found this airbrushing tool at Walgreen's it is meant to be used with Henna for temporary Henna Tattoos. I thought I could just fill the well with food coloring instead. It worked really well but did use up both of the canisters of CO2 that came with the tool - http://www.asseenontv.com/prod-pages/body_art_airbrush_tattoos.html It worked very well. The rest of the cake well it could have been better.