One of the beauties of stick welding is that you can weld threw all kinds of crap including plating. It would be hard to think of anything that you cannot stick weld. Not to say that it will be as nice looking as tig or mig every time, but it is definatly the most versital and you can use it in wind,rain,snow what ever.
I was trying to emphasize this a while back in this thread.
As far as looks go... some of the tidiest welding I've seen was done by accomplished stick weldors...
...Just check out Flangejockey's work sometime.