sand blasting is good but messy and more timely. I took mine to local machine shop and had them hot tanked, strips them complete and they are ready to paint. Getting all the sand out of the little areas can be a problem
Sand blast is pretty agressive. It will roughen the wheels noticably. You may not like the results. I'd recommend stripping and hit them with a pressure washer. or take them to a chemical stripper. There are some places that use plastic media blasting, that works very well.
A note about sand blasters the siphon type. they all have an ideal air pressure where they suck the sand the best. Put your finger over the sand suction port on the gun and vary the air pressure regulator to find the most suction.
I usually blast out on the concrete driveway. Get the wheels up a little so the sand doesn't bounce back at you. Every so often you can sweep up the sand and reuse it. Pretty messy job, especially on wheels. Wear a face shield. Check out Sears for sandblasters fairly cheap. Use any type sand, must be completely dry.