The darker paint for the background and the raised domed rim is a Modern Masters metals Collection (iron Paint)
You apply two coats , let dry and spray with a rust activator, let that dry overnight and presto rust! If you do it right you would swear it was actually rusted metal.
This paint actually has metal in it and you can tell by the weight, it is heavier than all the other paints.
I applied a texture to the beveled letter to give it the modeled surface, then moved the letter relief into position vertically, once happy with the position I "merged highest" the two reliefs and erased the letter vector after it was merged and the two reliefs were now one relief.
If you don't erase the letter vector, when you tool path the piece you would end up cutting the edge of the the letter and loose the outline or base relief.