Whenever I wear full makeup (I.e. foundation, powder etc...) I find that I get a grubby looking smudge of foundation/powder around the collar of my coat. I normally wear a scarf to prevent this but I have a new coat with a gorgeous collar that I don't want to spoil the line of by wearing a scarf. Does anyone have any tips to stop it transferring to my collar in the first place, or to clean it off again afterwards? Thanks a lot S&B gurus!