Originally Posted by PlawB
I looked some more into it. I figured un anodized aluminum would be easier to scratch, but that doesn't seem to be so. Anodization does appear to increase the metals holding onto lubricants. And the anodization layer does seem to be thicker than the normal aluminum oxide layer. But I couldn't get a straight answer that it actually increased hardness/scratch resistance.
Originally Posted by craptacular001
It absolutely creates a layer of hardness and scratch resistance. When you polish up raw aluminum you can take your fingernail and scratch it. Also if say you are playing with a raw bodied autococker the Lower tube will get chewed up very quickly from the hammer. Threads will also strip out if you are not careful with them.
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Aluminum when exposed to air forms a layer of aluminum oxide. If you didn't know this already but, Aluminum oxide in particle form is used in many grades of sandpaper and also as sandblasting media due to it's hardness. Type II anodizing (found on most paintball products) produces a thicker layer of Aluminum Oxide than natural oxidation, while Type III is even thicker (wiki
) but, more expensive. I can't think of too many paintball products that use Type III but, LAPCO for certain does on some (if not all) of their products.