Here is a simple list to get things anno'ed at.
For those in Canada
black sky anodizing in ontario
What is Anodizing?
It is an electrochemical process performed on aluminum that produces a hard, durable coating. The anodic coating is part of the metal, but has a porous structure which allows secondary infusions, (i.e. organic and inorganic coloring, lubricity aids, etc.).
Type II ano is room temperature anodizing that produces a coating ranging from .0002" to .001" in thickness. A wide range of colors are produced by dyeing after anodizing. This is the most common method of anodizing for paintball guns and parts. White dyes are not available for anodize coatings.
Type III ano is anodizing performed at very low temperatures, and very high current levels. It produces a coating up to .0035" thick, and is sometimes called "Hard Coat". It is a very durable finish, but can only be dyed dark colors. Some AKA products are type III anodized. Not many small anodizers offer this method.