Mill your main part from 1/2" material. We used white corian for our design.
Use this EASEL "link":http://easel.inventables.com/projects/b0kv2i1ciYbvmktNcsUk_A
Mill your acrylic part from 1/8" material. We used Caribbean color acrylic for our design.
Use this EASEL "link":http://easel.inventables.com/projects/HLn-78HXpKG9qeiuD_pb6A
Etch your acrylic part with a 1/32" bit
Use this EASEL "link":http://easel.inventables.com/projects/jTJrgB_Flxryd2UvLMOqzA