Air Stone veneer at lowes. If you put in the work, the final product can be outstanding. I used a wet saw: cut your pieces and level an entire row before you use any adhesive. Finally, Stain and/or seal for the best look. This product has a paper mache finish out of the box. I used Valspar High Gloss Sealer "Wet Look" - 2 coats - and it dramatically improved the finished look of the airstone. It gave the airstone a more realistic anappearancestains and seals to find a look that pleases you.