I have been cleaning my Marble Blue Luggage. This set was my mom's honeymoon luggage. I had stored vintage clothing in it and used masking tape to mark the contents. There is mildew and mold on the luggage and the cream trim is very dirty. I would like to collect a few more pieces. I use the luggage when I go to rallies for my linens and supplies.
I tried some mild soap and then vinegar, but neither of those products cut through the years of grime and dirt. I pulled out the orange Goo Gone and tried a corner. It did not discolor the blue and took off the dirt easily. So I used it all over the luggage. The Goo Gone work great, shining up the blue marble and cleaning the cream trim.