Personally I never remove bearings with the hopes of reusing them. They are a high precision component that is easily damaged especially if you beat on it with a hammer and punch. Personally I would replace them with roller bearings conversion. By todays engineering standards ball bearings are not correct for wheel hubs. Wheels see not only rotational loads but also side loads when you go around a corner. Tapered roller bearings are made to deal with both these loads. Ball bearing were never made to handle side loads. Short of replacing the bearings I would clean them where they are and call it good.