I've had these Warhammer models lying around unpainted for nearly two decades. I bought them on a whim, cos they looked really cool, even though I knew I'd never paint an Ork army (let alone an Orc army). I still like them after all these years so I decided to add them to my undead 40K army, starting with this tester model. Basically, I gouged out his eyes and gave him a gun.
I think I'll just use them as normal zombies. I did toy with the idea of bouncing bombs but I haven't actually painted any actual ordinary zombies yet (zombies will be the rank-and-file troop so I need a shit ton of them).