My preference is aging (the spelling, not the process)Ohmigawd--I hope so! Ha!
To me, there's nothing wrong with the spelling: aging.
G is soft before i as well as e, unless the g is doubled.
(All right, all right, MOSTLY. I know there are a few exceptions, but am unable to list them all, except the one where a word begins with g; for ex. ginkgo.)