Black80XSA
New member
Renovo is good stuff, but can be fiddly to apply and sometimes uneven coverage can create a shaby looking roof. Autoglym is OK, some consider it quite good, others less so I've used Scotchguard Heavy Duty water repellent spray on both my Boxsters for 6 years now and i find it very good for repellency and for longevity. Bit of a pain having to cover the car over with old blankets etc to spray the roof, but you have to take similar precautions with most products. I tried Fabsil spray once, nowhere near as good as the Scotchguard.