I would recommend not doing this^
When we got our foz I though it would be great to hit the cargo liner with some 303, or Meg #40.. ended up nice and shiny, but stuff slipped and squeeked around forever back there, it took a couple months and a bunch of hot water and soap to get it all off.
It only gets hot water and soap these days, sure it isn't jet black and nice looking but it is clean and the groceries stay where you put them..:biggrin:
the cover is drawn 24/7 anyways..