I used acrylic paints, the only part of the project that we had to buy. 118 ml tubes of Liquitex BASICS in
neutral grey (ore),
yellow oxide (wheat),
light green (hills),
cerulean blue (sea),
Hooker's green (forest),
red oxide (clay) and
titanium white (mixed with a little yellow oxide for the desert and beaches). 3 coats. I got
some expert advice to protect it with
polyurethane, so I brushed on 2 coats of satin finish on all sides of board and tiles. It made the board look a little yellowed, but the effect was only noticeable on the beaches/desert.