These vessels were originally pirate frigates from the Star Frontiers/Knight Hawks game. I might use them as such for my games, or they might serve as more cargo vessels--maybe special ships carrying back loot on an annual basis. Call it the Slannish Treasure Fleet.
Despite the deep-space environment of these craft, they have a design element much different than other ships in the Star Frontiers range. They wouldn't look out of place in War Rocket. I'd even call it a steampunk asthetic.
In an acknowledgement of that Victorian machinery vibe, I decided to paint these ships with a metallic look that gave the impression of tarnished brass.
I drybrushed these guys with three colors (all Folk Art brand): First, metallic antique copper. Next, metallic copper. Finally, metallic Inca gold.
I also finished up a trio of Federation frigates to join my civilian transport fleet. Hey, a privateer can never have too many merchant targets ...