Depends on how much it bothers you...if it's surface rust you may be able to remove it with some tlc. Lots of different methods to do this online. To have it completely re-blued, that'll be fairly expensive. It'll have to be disassembled, polished and re-blued. I'd be surprised if you could have this done for less than $500.OK new to all this but have a question. I am thinking about purchasing a cynergy sporting over under 12gauge but has rust on barrel. Its a pretty piece but would it be worth redoing?