To All:
The 303 products I used were: convertible Top Cleaning and Care Kit for Fabric Tops.

The kit has : 303 Convertible top cleaner and Fabric Guard Water Repellant
That's two 16oz. spray bottles. I think the Fabric Guard was what made the most difference because my top was pretty clean anyway.. I'm going to reapply it again. The defect is slightly visible now, but I hope a second application will help.
You have to cover the windows and paint, tape off the other soft parts and wipe off any over spray immediately. I used big black trash bags and blue painters tape. Becareful, take your time, let it soak in, spread it around, etc.