05 Coupe, 15, 000 miles, the trunk lining/carpet shows wear marks, like something heavy rubbed on it, no tears, or visable wear. just a slight discouloring (Canadian spelling) can anyone recommend a touch up spray or cleaner to resore the colour

 

If the color has been worn away, then you could try something as simple as shoe polish, or even locally dye it. Perhaps find out what has/is causing the issue and confront it. Regarding 'couloring' - it's colouring, and it's English, not Canadian!!!
A photo will help us understand the problem better.

 

Hey you hoser, in Canadian it's "colouring, Eh" LOL