I really enjoyed painting these two, they were painted as a pair but I wanted to base them separately so I could use them for other purposes than just as display peices.
I began with a base coat of Boltgun Metal with a wash of Nuln Oil to bring out the details, on the right side he then got successive layers of Runefang Silver, washes and finally a layer of Gloss Varnish over the bright silver to make it really shine (a trick I picked up from Hendybadger, thanks mate!) this contrasts well with the very matte finish you get from the Ryza Rust and Typhus Corrosion. The Sword was painted with the same colours but different washes and with the addition of a Burnished Gold hilt and an ivory pommel. I wanted the sword to look quite different to the armour and I think it worked ok. The gem on the blade, they eyes and the gem on the back of the armour started with Temple Guard Blue, a little Nihilakh Oxide (Technical Paint) for the glow and a point of pure white at the top.
I wanted it to look like the Oxidation Beast's attack was creeping up his body from his left foot and hand up through his body, so over the base coat I layered Typhus Corrosion and Ryza Rust with a little Runefang Silver on the edges, i'm really happy with the effect, these Technical paints are very very effective.
The Oxidation Beast (or for us old D&D players, The Rust Monster) started to go wrong but i'm happy with how it turned out in the end.