A bit of update.
Done with sarcophagus, exhaust and reactor. For sarcophagus I go with a bit bluish steel it's gloss and a bit reflective. At least it's reflect three pegs on the top and white lamp on the right. 

For exhaust and reactor i choose a satine finish. I like result but yellow reflections on reactor.

Should I make them bigger and run across top edge? 
Or leave them as is? 
Exhaust is just fine. You see it's metal it's scratched. 

Also should I add some tints to metals? Like a bit grin or torque?

As always your honest feedback and harsh criticism would help me.