The hard water spots can't be from rain. Maybe from neighbors sprinkler

or tap water. Clay + Menzerna / Zaino with PC
First 3 steps with PC, last step by hand.
- Menzerna Intensive Polish PO91E +Menzerna Top Inspection
- Menzerna Final Finish PO85RD +Menzerna Top Inspection
- Menzerna Finishing Glaze PO115C
- Menzerna Power Lock Sealant