I have ben wondering the same thing. The person who got me into
vaping use to drop his 510 all the time, and it looked like... lets just say that it wasnt presentable. I have been treating my egos very carefully, because i saw how his ended up looking. It would be nice to have some sort of protection on the finish.
On a side note, i have been purchasing the stainless atty's also. The cone on the eGo covers it anyway, so noones the wiser, but i dont need to worry about it looking like crap if i drop an atty.