Brett said:Wire wheel, then I just wipe everything down with either brake cleaner or paint thinner. Do this till you aren't getting anything coming off the metal on your rag.
I sometimes will scrape the rust off with a chisel first if needed before wire brushing. And I prefer wiping down with acetone or alcohol. Paint thinner can still leave a film. Brake cleaner has worked well in the past though, just expensive to spray all over. A gallon of acetone should last you for a long time. I am still on the same one here after years, and it gets used just about every weekend around my place.