I find gundam marker is very hard to work with! I am using Faskolor color:
http://www.parmapse.com/faskolor.asp I use it for any kind of paints, takes about 20 mins to set, 24 hrs to completely dry! Make mistakes, not problem, just clean the mess with a wet cloth! If the result is not as good, peel off all the black paints, and start again!
