The Delamain Crackle Porcelain Door Knob on Rose Florentine Bronze has many different applications due to its versatile, unique colour and finish. The crackle glaze porcelain knob is very practical and easy to maintain as well. Just a mild soap and water solution is enough to remove dirty marks and the florentine bronze will require a soft cloth for dusting and a mild soap and water solution to remove marks, then a quick buff with a soft clean cloth and a light coating of beeswax.. Matching Accessories for the Porcelain Door Knob Please note – when purchasing ...