Thanks very much for this very useful.Cheshire Cat wrote: ↑Fri Feb 28, 2020 12:29 pmI have two cars to wash, my Macan and a VW Polo. Both cars are 'fettled' in the Spring i.e. paint prepared and cleaned and then polished and sealed so washing is easier. I use the filtered water for the final rinse and , of late, taken to filling a watering can with it as it seems to wash away the final soap residue better. I use Bilt Hamber car shampoo for that reason, it rinses off better and doesn't leave any residue like some other which are bulked up with salt. To answer your question, about a year before new resin is put in. I do know of some folk that have two bottles and connect them so the 'old' resin is in the first bottle and the new resin in the second. This may make it last longer. During the winter, I'll only wash them once every two-three weeks weather permitting. My next toy will be an air dryer. I currently use a leaf blower which is ok but takes an age.
Cleaning and detailing your Macan.