Hmm, I know there are a lot of Byce tut sites out there. you may want to look through www.bryce-alive.net for mapping tutorials. essentially do is create a image map in photshop or paintshop with the engraving texture. You then create a alpha bump map from that image to simulate the tooling marks. You apply the map to the object like any other texture map. I'm not saying it will real easy but that is one way of doing it.