When purchasing the product, I was a bit skeptical because the convertible top of our VW Golf looked pretty taken. (The car does now since 12 years his faithful service and winter and summer outdoors, often parked under trees.) I stuck strictly to the manufacturer's instructions, however, the procedure repeated once; so could even the most stubborn dirt residues are removed. The whole took no eternity and the result is outstanding (the age of the roof could not of course be completely retouched). Then I made a Neuimprägnierung and I am very pleased with the results.
