Here is another idea for you to reveiw and it is just another option for using a laser. Wood is a great material for engraving and the possibilities are extensive but the list of materials available are almost endless.
This is simple line art engraved on AlumaMark material. AlumaMark is an aluminum material available in .005" and .020" thickness with a special coating that reacts to the laser when engraved and can accept shading. AlumaMark is available in gold and silver.