I have the white on white Le Creuset. My stainless steel sink has left marks on the bottoms. I suppose it is from placing it in the sink to wash and moving it around in the sink creates the marks. The Barkeepers Friend has been uneffective. Also is the barkeepers friend abrasion going to eventually wear off the shiny surface of the enamel? Will the Le Creuset cleaner help get the stainlees marks off? Can I get back the shine that was once there?