A lot "Dinosaurs" in the media are depicted quite wrongly, with lots of scales and spikes, like modern crocodiles or even worse, like monitors and iguanas. While we now know that many of those real life animals, were indeed covered in feathers and looked much like modern day birds. Certain theropods would be almost indistinguishable from a modern bird of similar niche. BUT, this wasn't always the case, and yes some of your favorite dinosaurs may have actually been more crocodilian, in their skin and scale texture than avian. Looking more like the general conception of dinosaurs.... And then there are those with even heavier armour than first believed. http://markwitton-com.blogspot.dk/2015/12/dinosaur-scales-some-thoughts-for.html This Articles grants a couple of examples of different scale impressions, among other the real life Stegadon=Triceratops, which were more than a little armoured. Apparently it had tough scales similar to an armadillo, almost. Which means that your stegdon, is probably one of the few of the warhammer models, that is pretty close to its real life counterpart. Just saying
Apparently the group called carnosaurids (allosaurus, carnotaurus, giganotosaurus etc) were primarily scaly, at least as the article also present some specimens. Perhaps they had low covering of feathers or patches of feathered, but there aren't any direct proof that carnosaurids were fully covered, like most coelosaurids (dromaeosaurids, tyrannosaurus etc. )
Carnotaurus was actually an abeliosaurid, more closely related to Ceratosaurus and it's descendants/kin, not a carnosaurid, which consisted of allosaurs, neovenators and carcharadontosaurids .
I love this. I hope the Jurassic World team are watching - it would make a hilarious but brilliant sequel!
Young T-Rex did have feathers, and it is generally believed that T-Rexes lost their feathers when they reached adulthood.