Originally posted by juggernaut74
If colossus is injured in metal form he will be healed when rendered back to normal form as far as i know. I read this somewhere.
You read incorrectly.
In addition to Wynndar's example...
When they encountered the Marauders in the sewers underground, Riptide launched a number of shurikens, stars, and assorted other throwing implements with such force that many imbedded themselves in Colossus' hide. Magneto had to "heal" Colossus' metal hide so that he would not bleed to death when reverting back to normal.