I had the kit depicting Steve Austin lifting a gorilla over his head.  I may have had the diorama  of Steve fighting a crocodile as well (though I may be remembering a friend's kit).

I used to get Silly Putty and shape it around the bionic "innards" and then carefully pry open a "gash" as to suggest damaged "syntho' skin".  The naturally biege color of the putty served well enough for caucasian skin.  Anybody else do that?

Sincerely,

Bill

Tempt the Hand of Fate and it'll give you the "finger"!