Yes! In the original X-Men comics Magneto was able to throw lightning bolts! In the sixth X-Men comic Magneto made a mental version of himself out of pure magnetic energy. Just like how Professor X can create a mental version of himself with his mind.
Magneto's power is to control electromagnetic energy, not metal. In the first movie when Storm said she was going to fry him, instead of using his brain he could have just put a magnetic field around himself.
In the second movie, when Magneto was in that room made without metal, he could have just blasted that plastic gate open with electromagnetic force. And in the third movie he could have just crushed those plastic cure guns by putting a magnetic field around the guns and crushing them.
I know that because I read the X-Men comics from 1963 written by Stan Lee and illustrated by Jack Kirby. You should do the same if you want to know about Magneto. But I do think the guy who played Magneto in the movies was great.