The acrylic paints you can buy at Micheals work great. Once you apply the acrylic you can go over it with a clear water based product like Polycrylic, which you can find most anywhere. One thing to remember when painting a foam plane is that it will only look so good, because it is foam. You can go through alot of hassele trying to make it look like a covered balsa plane, but its not worth it in my opinion.