There's been a few threads on some of the ski boards over the past couple years that have debated the merits of using any wax at all. I'm not going to get into that here, but I'll only say that at this point I believe that structure and especially "texture" of your bases are more important than wax. If your bases look like crap without wax then they will eventually ski like crap again once you've worn off the top layer of wax. With meticulous structuring (starting with machine grinds and then lots of brushing with different brushes, and work with a riller bar) you can achieve what I call a smooth texture base with structure. The more you work the base the better it gets and roto brushes really take a lot of the work out of it. My bases look like they've been waxed even when they haven't been waxed in forever. I really only use the wax as a "lubricant" to aid in the brushing and structuring.
It was common many years ago that waxing a base was required to protect the base material. Today's advanced sintered bases do not require that level of care. Your skis will be long gone before your base dies from neglect (lack of wax).