The person you need to pm about this is Angeli, she is our resident Chinny expert. I have persians myself and various techniques of stain removal. To start with you need to be bathing the area every day with makeup removal pads soaked in boiled cooled water.

This is not always adequate with light colours, there are ways of 'packing' the stained area with optrex and certain cleansing powders. Talk to Angeli first though because she has the same breed as you do