Hasn't Camilla been going to the same salon for donkeys years? The woman who owns it is of similar age and she's been interviewed herself and just said they generally chat really normally about their grandkids.
Kate supposedly gets a spray tan at home in advance of an event where the arms and legs are gonna be out. Quite wise, a person's legs can look ghostly in flash photography (See Sophie, who doesn't) . Some people say it's once a week but I think that's absolute bollocks and normally she just slaps on the old St Tropez like the rest of us.
Sophie also does not seem to use a hairdresser for events or for Royal tours abroad. She should, she's not that great at doing it herself and she can afford it. And no one would begrudge it, given how much of a workhorse she is.
CP Mary has a proper official glam squad who have been regularly mentioned in the Danish press. She makes full use of them. She spends a lot of money on them.
Maxima also has a team but sadly her hairdresser never ever uses enough hairspray and Max has historically always looks a bit windswept and surprised.
Anne seems to not believe in doing ones eyebrows. Generational thing, the Queen doesn't either. She apparently uses Clarins make up almost exclusively.
There are several European royals whose appearance owes more to their surgeons than moisturiser, however.