My peice of hopefully helpful advice is to narrow down your palette; right now it looks like you have silver as your primary colour and then gold for trim, but then you have a lot of blues, a lot of yellows, a ton of red and even some green and orange.
I'd use red for the blood splatter; it looks cool and its well done, but other than the medicae symbol I'd stop using it.
Next I'd choose blue OR green for the vials and apothecary gear, but make it more dark and less like its radioactive

. For the vials you can paint them to make them look half full and it will help keep the colour from getting too overwhelming
I'd use whichever colour not used on the vials for his bionic eyes, either would look really cool and would really pop; sadly the orange just blends in with the yellows and golds
As for that yellow I'm really digging the hazard stripes, however the pistol casing and yellow tube isn't very useful as the solid chunks of yellow really pull my eyes towards them and to all the sweet details on the model, the exhaust vents are a maybe
imo.
Anyways thats enough from me, I really love how you're doing Iron Warriors since I don't see them often (especially in
HH) and you're a good painter, you just need to work on placement a bit