How I cleaned the zip on my vintage Louis Vuitton Trousse Toilette 23

I bought the Louis Vuitton Trousse 23 pre-loved from a seller on Facebook about 9 months ago. I was really impressed with the quality of the item, being a vintage piece from 1989 (the year of my birth!). However, I knew from the offset that it would be worn – I fully expected it to have a bit of an old smell and the hardware to be faded.