How to let others know about your boundaries politely without sounding like a overly protective bitchy mom?

I basically have issues with people carrying my baby while wearing heavy perfumes, using their oily faces or faces with makeup to stick to my baby’s face or using their hands to touch my babies cheeks… BUT I JUST DO NOT HAVE THE COURAGE TO TELL THEM AND SECRETLY HOPE THEY WILL READ MY MIND AND STOP DOING IT TO MY BABY (but nope, it just keeps on happening) , so now my baby face has acne and weird looking oily stains / scars :(