Can this adhere to ceramic tile that has been painted? How many sq feet will 16 oz do

Hi there! Yes, Beyond Paint can adhere to previously painted tile. It's important to note that if there are any existing chipping/peeling paint, excessive bumpiness or deep gouges, these must first be addressed, sanded and/or repaired prior to using Beyond Paint. One pint which is 16oz, will cover approximately 25-50 sq ft with two coats. Hope this helps!