so, most of the effort could be placed at the finish staining?
I'm going to be frank here; I've done colorized waxing in the past. As a showcase for marketing, esp. photography, it's nice.
As an actual product, you'll starve long before you get paid for it.
As a clinical reality, the patient is interested in solving other problems.
In economic reality, I point you to all the techs that layered posterior pfm that rivaled nature.
They're all trying to get into AO4 or digital dentures because monolithic zirconia ate their lunch.
IOW, patients prefer price and function over beauty.
In our realm, unless the smile line is really high, you shouldn't see base except papillae or slight gingiva sulcus.
So why invest heart and soul into that rabbit hole.
In answer to the question, if you're all on fire to travel this path, then yes, learn to stain in the flask or do a composite rework of the cameo post process.
But unless you're commited to dolling up every denture, you'll never get takers as an add one