When applying Stone Coat Countertops epoxies you need to be aware of the humidity levels. We prefer that you work in an environment that contains 50% or less humidity. The higher the humidity the higher the chance for amine blushing. Blushing, sometimes referred to as water spotting, occurs when moisture condenses on an epoxy surface during the curing process. Sometimes the moisture originates from within the porous substrate. It manifests itself as white patches or a milky, hazy effect in clear coatings and may cause a lack of gloss in pigmented coatings. If so, it's simple to clean away. All you need to do is use some warm soapy water--we prefer Dawn--and clean, dry and then sand with 150-220 grit sandpaper and wipe with paper towels. You are then ready for the next coat. To ensure this is not an issue in the future you can take additional steps in preventing this. Work indoors where the humidity is controlled or acquire a dehumidifier for your workspace. Thank you for your business; we are happy to help.