[Perfectlap]

if you have worn off the coating you might need to get in touch with Leatherique and ask for one of their dye kits to fill in the discolored cracks. Their rejuvenator(cleaner) and prestine clean(conditioner) do wonders on 80's and early 90's leather like the 928. I'm not sure if Leatherique sell products for coated leather specifically but I use the prestine clean once a month to keep it soft during the colder month when leather can dry out.

1Z leather cleaner from openroadmotoring.com with a regular terry rag it will lift all kind of stuff off the leather that the over the counter stuff missed. What I love about the stuff is that it leaves it looking new instead of shiny and greasy. 1Z is for coated leather.