Yes, bedding will be good enough to place on the wire. If you didn't have a smooth suface, they could get bumblefoot from the wires. It is really nasty if your rats get it- I don't think they willl.

Also, since they are males, they will be a little oily/greasy...you can give them a bath. That's what I do with my boys. They like the water, and it gets them nice and squeeky clean. All my rats get a bath about once a month, because I am allergic to them. It helps my reduce my allergies. My boys give me hives.