Just after the battles I had for the opening of the Purokar League Campaign; I have decided to finish off a pair of Contemptors I started 2 years ago and some other units for extra stopping power.
As they stand. I decided on doing one generic and with the most common Death Guard armament (Multi-Melta and power claw - See Betrayal) as well as another one which is plasma heavy (mainly as there was an image of Heavy support Legionaires sporting Plasma Cannons in collected visions).
Leave to bed in for 2-5 minutes.
You can add slightly oil tainted white spirit pools too at the bottom of armour plates to give it a brighter towards the top vibe and grimier towards the bottom (see how it looks on the Contemptor's left leg in pic above (right leg on photo)).