I change my vote. From viewing photos - the nose is deceptive, but looks on par. The bushy eyebrows I can attribute to the various trends of the day.
On one hand before the 80's gay cult Freddie, you've got Prenter sporting a clean cut, fresh out of the shower look. Then post Burt Reynolds - into gay clone era, he likely grew the moustache out and left the eyebrows (*If they were not naturally blonde to begin with) out and invested in some boot black. But the rest adds up.
That's why his haircut and eyebrows looked so dour and puppet like. They were dyed to the point he looked more like Lady Elaine Fairchild from Mr Rogers Neighborhood. (*with darkened hair)
matt z