[harrisg]

Just had the roof completely replaced free of charge by the Official Porsche Centre so I'm being very careful about how I treat it over the next 12 months. First, I don't think it should have anything applied in the first year. I don't wash the roof or allow any general cleaning products to land on the fabric.. If it gets wet, I allow it to dry and definitely don't put it down wet. That's how the fabric get permanently creased. I brush it with a clean stiff carpet brush to keep the fibres lined up and looking fresh. In the UK we have a company called Renovo that supplies a well respected renovator for the fabric and I used it on a previous model.
By all means renovate after 12 months, and re-proof. Other than that, I'd leave it alone.