This guy is one of the few Space Marines to come with Errant Armour (Mark 8) and is a 1990 sculpt. He’s part number 70106/57.
I painted this chap up as a squad leader for a Tactical squad, and did his left knee in chequered company colours. A WIP of his knee:
Undercoat: Vallejo Mecha Black
Base coat: Scale75 Cobalt Blue, brought up with Primary Blue, shaded with Prussian Blue, highlighted with a mix of Primary Blue and Art White
Red: Art White, followed by Primary Red, shaded with Crimson, shaded with a mix of Prussian Blue and Primary Red, highlighted with a mix of Primary Red and Orange