*Edit* This thread has a ton of useful information for newbies regarding barrels, motors, mosfets, electrical, etc.. Definitely worth a read. Original message: So I received a bunch of airsoft stuffs from my wife for Christmas, which included a 509 mm prometheus eg for my jg aug. Upon inspection, I noticed that the interior surface of the bore is not exactly what I would expect a high quality "polished" inner barrel to be. If anything, my stock brass barrel was shinier though perhaps more uneven. I attempted a polishing method using brasso on the prommy and it didn't seem to change the look. Am I just mistaken in worrying that the bore isn't glossy stainless steel like the exterior, or did I just get unlucky and get a flawed one?