We can clean up every girl for you if you wish.
They all have a shower and douche immediately before the shoot. If it is not good enough they are sent back to do it again.
But if you are talking about the natural ring around their anus then it's a photoshop job and if we do it for one we do it for everyone and some will not like that.
There is another consideration, if a girl had anal sex recently it could be a darker ring. Does this mean I'm not allowed to butt fuck them in the interview?
Seriously show me an example or give me a set number.