I had te chance to play with some more slate last night.
I tried a couple things and all came out pretty decent. I used my friends name, BAZ as a guinea pig.
The laser can easily engrave the letters in a traditional raster engraved sense.
With a little twist in Corel I also created the rubber stamp look, etching material away, leaving the letters behind.
Last fun twist was using the vector cut mode to get a deeply engraved outline for the letters. I really like the rubber stamp look the best. The vector cut lines are clean and crisp, but almost too precise to be plainly visible from a distance.