For Mystique in "X-Men: Days Of Future Past", according to her she had a few problems with the body paint while filming "X-Men: First Class". However, it looks like she will not be going through that again.
"I'm so excited because I'm going to wear a body suit," she told E!. "It will be from neck down so it will cut out time and the blisters."
She also gave us a filming date, kind of "May-ish. I haven't read the script yet. I haven't had 30
minutes. They literally gave me the script and I was like, 'I can't read
this until Monday.'"