If you want to get a quality, professional wood engraving, you need make the proper preparations. Take a look at your wood to be sure that it is sanded and smooth. Make sure that you stain and clear coat your wood before engraving.
After you have finished engraving with your laser, you need to give it some additional care. Seal the engraving with clear coat or lacquer prior to any fills, so the engraving looks prime and finished. For more laser wood engraving tips, click here:: Preparing wood before and after engraving