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A glass paint brand with reknown is Perm Enamel. There is a 10 day air cure time during which no water or other liquid can come in contact with the paint. If you leave the work for this time, to cure naturally you will have quite good results. It is said that of all the glass paints this one is the most durable in dishawashers and microwaves...but my advice will always be treat a handpainted item with care...no dishwasher and no microwave!