What if the only problem is an occasional water stain. Does the whole ceiling have to be treated or can the stained area be touched up?
No, the whole ceiling does not have to be treated. ProCoat provides an Acoustical Tile Restorer in Aerosol. This product provides a quick one-step solution to water stains. The same product is available in an ultra-white for touching up ceilings previously coated with ProCoustic.