Not sure if you sorted the problem (was a long time ago - I have only just joined forum) but there looks to be two issues there. There are fine, almost circular swirl marks that could be rectified with a fine MOP. The blotches to me seem like normal water spots. Water spot removers are available (e.g. from cleanyourcar.co.uk) or you could use deionsed water from a filter (e.g. raceglaze.co.uk). Not sure what wash regime you may use but certainly dry the car after rinsing and try to clean the car in the shade. Cheers, Dan