Is your car exposed to sun everyday? Mine half exposed and rear bonnet is full of watermarks now. A lot of swirls and hologram now on top of the coating..quite obvious on the black car... I even use the coating maintenance product weekly also don't seem able to prevent this.

let it be now.... can't do much.. Not sure this issue apply to all coated car or jsut specified coating brand..

You can try fireball waterspot remover/Gyeon q2m waterspot to see whether able to remove the watermark, I think only able to remove light watermark that not yet etch into coating.

Good luck..