Does this render look physically correct?

[fa2020]

Hi,
I've modeled this spur gear in SOLIDWORKS and rendered it in 3DS MAX and Corona. Please look at the image and see whether there is any physical defects in my material settings and render or not. You'll see two types of material for each color, cloudy and translucent plastics.

[burnin]

I find them lacking, not really convincing enough. One feels strange as it shows translucency at the back (bottom side) and other doesn't appear plasticky enough, since it shows almost none of subsurface scattering. Find a balance, somewhere in between.
Or play with SSS examples by Ludvík Koutný from Corona library.