Mag wheels and aluminum alloy wheels are very different things. Pressure cast aluminum alloy wheels are utterly different than rims machined from billet aluminum. The answer also depends on what you expect to do with the wheels after removing the chrome. Are you preparing them for replating with nickel-chrome? Are you trying to leave the nickel plating on them? Are you trying to prepare them for powder coating? Are you trying to mirror polish the billet wheels and leave them as polished aluminum? Do you need to remove the chrome only minimally because you don't like it, although it's adhering fine, or is the chrome a peeling flaky mess that must be completely removed, not built upon? People have different ideas; some think that sandblasting is best, some think that chemical stripping is best --it may depend on how much training you've had with toxic chemicals, what kind of personal protective equipment you have, and whether you already have a sandblast cabinet. Not offering that kind of info while asking for "the right way" is like asking whether you should buy a Porsche or a Kenworth without giving us any other info :-)

Powder coaters have told me of their success with a light sandblast that removes the chrome and etches the nickel. It's a fine answer, but not if heavy layers of nickel are peeling. In that case you must chemically remove the nickel and you can't do that yourself, you have to take them to a plating shop because you cannot dissolve nickel into any chemical commonly available to consumers. Oven cleaner may be useful for removing anodizing but not nickel plating.