You have often mentioned opening up small. sealed, ball-bearings (even new ones) to clean out "inferior" grease and put in your favorite. So, how do you open those? The only way I can see is to insert a small blade between the inner lip of the seal and the bearing inner race and pry up. This seems certain to bend the seal, if not cut the seal lip. I have several bearings on an ancient lathe that need attention.