I've posted it before so I'm sure you could find it..a video of him wearing the full mk3 suit and how much work it takes to get it on...and how he can't hardly walk in it. Bet even so...the full suit is made for every film (I'm not 100% sure on Aou as I didn't know most the prop/costume people)....but for the others it was. Not all the HPP suits. But the mk1-7 (except the mk5...though most of it was made but never worn)
The design of the suit itself means a full suit would never work. Not for anything other them standing there. Which means a pretty boring movie.
I'm curious where people come up with things sometimes. 20 plus years ago not knowing something easy to find I can understand. Info was a bit harder to get. But with a two second Google search I'm sure you would have found a thousand pics of the practical suits and RDJ in them. I don't get it. On top of making a comment like it is done one way, a way that is not true, becuase the actor can't be bothered....like he's too good for it or something. It's easy enough to find the truth with a Google search that takes two seconds...but I guess you can't be bothered. See, doesn't sound so nice.