These are optional supplies, often "consumables"

Shiny surfaces such as backs of iPods: use the Cermark laser etching spray - we get ours from Laserbits ($64). Spray the back of the iPod, wait 15-20 minutes then etch as usual. The power should be 100% and the speed should be the wattage of your laser, for us the speed is 35 since we have a 35W later.

After the etch you just rub it off with a damp paper towel.

Good when working with acrylic: will buff and shine! Sort of like toothpaste, comes in bottles. Apply with rag (has directions on bottle)

Available from McMaster-Carr and some hardware stores

Fine scratch remover (8 oz) $6

Heavy scratch remover (8 oz) $7