How To Wash Pottery Barn Quilt . Pottery barn teen print patchwork quilt & sham, twin size. Apply hot stone paint by valspar. Rosalyn Patchwork Cotton Quilt & Shams Pottery Barn CA from www.potterybarn.ca Then i sewed a seam and trimmed the excess from each corner. Fill your sink with warm water. Apply a thick coat of hot stone paint by valspar.