"I trust that people who 'enjoy' this sort of thing wouldn't mind viewing a member of their immediate family on display . . . . "

Maybe they would not mind seeing an immediate family member preserved in this form.
Watching a deceased family member being lowered into a hole in the ground or slipping behind a curtain to be cremated is disturbing is it not?
If a loved one requested that their body be donated for plastination but the thought of viewing their departed loved one's body after the process repelled their family then the family would have no choice other than to decline viewing the result.
If it was the request of their Loved one to donate his or her body to be preserved in this manner then any objections on their part are redundant, if the family respected their loved one's wishes that is.
I trust that people who 'enjoy' this "sort of thing" would not mind viewing another human being walking around in a healthy body because they have had a vital organ replaced due to a stranger requesting that their organs be recycled after death and the stranger's family raised no objections to their loved one's request.
~N~