I have found good results removing bearings from alloy cases by heating the case in the oven to about 300°F and then quickly turning the case with the bearing facing down on the workbench and tapping on the case and the bearing/race usually just drops out due to difference in thermal expansion of the alloy case vs steel bearing/race. If it is stubborn, you could heat to 320°F and help get it out with a wooden stick.
To reinstall, put the bearing in the freezer in a ziploc bag, and re-heat case up again, remove bearing/race from ziploc bag, and drop the bearing/race into its seat in the case, and let it all cool down.
Re-grease, and Bob's your uncle!
Haven't tried it with a powder coated case, but maybe ask the powder coating guy about whether heating it up would be any problem.