Usage convertible roof

How many litres do I need in order to clean and impregnate my convertible roof?
That depends how dirty your roof is. For a normal level of pollution on a convertible roof we recommend using the following quantities: 

• 1 x 1 litre Sprayhood & Tent Shampoo
• 1 x 1 litre Power Cleaner
• 1 x 2,5 litres Sprayhood & Tent Protector