Practicing SAFE BEAUTY means caring about your clients' health and hygiene.  Disposable headbands and capes protect your clients' hair and clothes, and show that you are a conscientious, professional makeup artist.  Tell your clients why you practise SAFE BEAUTY,  why you use disposables mascara wands and the like, they will thank you, and they will talk about the fact that you treated them professionally. They will refer you and that's good business sense.