Looking for some magic

I'm working on a large ash bowl and any attempt to sand it results in a wavy surface. The grain alternates hard, soft, hard, etc and I'm wondering what you've tried in the past that that produced a better, smoother surface on something like this.

Cleaner finishing cuts  

Unfortunately this is a common problem with a few of the woods we like to turn.  I try to end with finish cuts to the point I can start sanding with 180-220 grit, no matter what the wood.  The less time you have sanding the better results you will have with these troublesome woods.   I will say a lighter touch using a sanding pad under your paper, or a rotary disc sander instead of just your fingers helps a bit, but I have not found a true cure for the phenomenon.   In some cases I just go with the end results and explain later how difficult it it can be obtaining that same even wavy recessed look across the piece

Thanks Dave. That my approach also but I thought I might be missing something. I usually say that there's no extra charge for the "antique" sanding finish on the bowl.