Anytime. Sakuras dry rock solid, where as these paint sticks you are talking about, kinda tend to still smear and scrape off easy. I've compared the two in the past..
ohh alright , yea i bought a sakura just to try it and i fell in love , i love all my homemade markers but they get messy
[Broken External Image]:http://www.sharpie.com/img/compel/IeAYUYI55MyfnmzRqNb8BMO-0UlIWSs7/34973_lg.jpg is the paint in these cool because you could make some sick colors with that pack