looking great!
For sealed bearings you can get the seals off relatively easily. Rubber seals are easier, just stick a very small flat bladed screwdriver or pick in at the ID edge and gently lever upwards. You might bend it slightly, but they're easy to bend back flat. Metal shields are a bit trickier, essentially the same process, but you're more likely to bend the shield. Again, you can bend them back easily enough, though they won't look as pretty as before. If you can take both shields off, you can easily soak them in degreaser, flush them out with WD40 and dry them out with compressed air. Then repack 1/3 to 1/2 full with some decent high temp grease and they'll probably out last you.
Note, for the lower bearing depending on how much of a pain it is to remove, it may be worth cleaning and regreasing in situ rather than risk damaging the races by removing it.