Cold Iron and others do the renomat stripping, but I never have. I tend to stick to a damp cloth, serious brushing (especially early in a shoe's life, when the shell will "spew" in the rolls), and occasionally renovateur. I find that a lot of the wax / cream that AE applies will come off with a damp cloth + brushing. I use the damp cloth, brush for 5 minutes, damp cloth again....etc. I stop when no more finish color is coming off on the cloth.
I believe the answer to your question about whether adhering to the "Mac" method will accomplish the eventual removal of factory applied cream is yes. It may take a while, but yes.
Bucksfan, thanks, that was exactly the assurance I was looking for. Plus, you anticipated my next question as well.