Test Paint

My husband decided to build a 3D printer, and is now working on printing Settlers Of Catan tiles. We're now just experimenting with how to finish them. I tried priming it gesso to smooth out the Z axis lines, and help the acrylic paint stick. I've never actually painted anything before, nor have I worked with gesso. It started to crack and peel, unfortunately. Good thing I practiced on the cracked tile. If anybody has some suggestions on how to make this work out better, I would be more than happy to hear them.