guess what??? ANOTHER QUICK LITTLE SKETCH!!!!!! i am so tired. i feel like this one isnt totally done but oh well. i have way too many more quick little sketches left to be done to worry about such things.
You did a marvelous job getting all the details and the metallic look!
May I suggest using a Q-tip, smudging pencil, or a tissue to soften the pencil lines where you shaded it in? It would make the tones soften and look more metallic. Though, I wouldn't recommend doing it just yet... if you have no practice doing so, I would suggest doing another drawing and practicing smudging with that. I wouldn't want you ruining such a great drawing :]
Keep up the great work! You've got a lot of potential