Nail polish remover just enough to thin 2. Vitrail glass paint. Swish inside jar or bottle. Allow to sit for a couple of days. Voila, waterproof vessel for flower arranging or anything else in the colors you love!
Removing Oil, Paint and Other Concrete Stains Remove oil and grease stains from concrete using TSP and other cleaners http://www.familyhandyman.com/garage/removing-oil-paint-and-other-concrete-stains/view-all