Here's something my mate and a friend did to me in August that I've wanted to do pretty much my whole life.
Encased in plaster head to toe to be rigid as a statue would be.
I've got a big kink for statue transformation or encasement. In that shell there I'm having myself a moment of fulfillment, though you can't really see it on my face.

This was achieved by first making a plaster mold of my head using alginate (sorta like liquid latex) and plaster bandages to create a shell over my head. The plaster bandages hardened in about 10 minutes to a firm shell, and then a second layer was applied.
I took the head and added ears made from cardboard and wrapped in plaster bandages, then built up a muzzle with bundled up painter's tape. After that hardened I hollowed out the interior behind the muzzle, giving room in front of my mouth as later it would be used to fit an inflatable gag inside the chamber.
Tiny holes were poked into the front of the muzzle that retain the look of facelessness but also allowing me to breath just fine through my nose.
I attempted to make a pedestal with poured plaster in a cardboard box and Dr. Scholl's foot inserts embedded into it to make my feet comfortable, but upon stepping on the hardened 2inch tall block it immediately broke in half. It'd've needed to be much thicker.
Instead the look of the pedestal is merely a rectangle of plaster on the floor sort of cementing me to it.
My entire body was wrapped in black pallet wrap - basically saran wrap - to protect my skin. I had intended to have the plaster right on my skin but vaseline wasn't matting down my hair even after shaving.
I assumed a pose as my mate and my friend soaked the bandages in water and placed it over the pallet wrap. It took about 30 minutes to cover me up below my neck, and it quickly hardened, which gave an incredible sensation as you find this paper thin paper mache material is suddenly rigid and dense. The inflatable gag was installed in me and the head was put on. I was blind and unable to do more than a quiet mumble. Noise cancelling earbuds were put into my ears and played some odd electronic space music from a cellphone that was encased with me as well.
From then on a second layer was applied to my whole body and a third layer around my waist, knees, and elbows.
This, however, wasn't really enough to keep me truly immobile. Half-strength wiggles were moot and void, but I was able to shift and move within the shell and this had a visual impact on the outside. There was about 40 pounds of plaster (estimate) added to my weight and that bared down on my feet, which made it painful.
I was worried about overheating, but it was quite the opposite. I was basically refrigerated as that fan in the background blew cold air over me, and it was neigh uncomfortable in the cold, but at that point I had no way to expresses for them to turn off the fan as "turn off the fan" translated to "mmrrn murff mm fffmmm".
Their touches were not felt if they were a simple touch or sliding of the fingers over the shell. As they would tap their knuckles the resounding thunk was felt as vibrations and impact.
I was within audible distance for safety as they departed, turning off the lights, and leaving me to 'stare' at the corner of the room for a few hours.
Objectification really hits quickly, and there's no good way to describe it. It's not 'intense' and it's not 'exciting' as the mind wanders into a state where you can't feel the room outside of you, you feel you have no direction, your understanding of time is completely lost as the voices around you depart and leave you in isolation. Thoughts are hard to hold onto, and it's an onslaught of strange imagery that comes to mind blended in with periods of blankness as you feel you're in space.
In my years of dwelling on thoughts of what it would take for an idle mind to accept a zen like state.. I can say it would happen very quickly. At least for me, anyways.
As they checked up on me for the final time they asked if I wanted out, and due to the pain in my feet I affirmed it.
I was able to break myself out of the shell which was exactly as much fun as you think it'd be. Stressing on a spot cracked the shell and busted off pieces at a time until I was free and scraps were scattered on the ground and left a horrid mess. I was exhausted, tired, a little loopy, but very satisfied. I didn't know how long I was in there. I couldn't even guess until I looked at the clock showing it was 4 hours total. I did feel like a statue and sort of looked like one too :)