Cement dust on paint

[georgeb]

Some assumptions here.

They are doing a fair bit of building around us so there's a lot of dust flying around.

Auntie Crazy, the maid, hoses the garage out each day and obviously decided that she'd sprinkle the car as well.

I'm now left with little white rings where the water has dried on the bonnet and windscreen.

I've got the screen better using a fine scouring pad, although it's not 100%, but I'm loath to do the same to the bonnet. I can also see using a cut or polish potentially leaving marks.

Anything I could use to try and soften the cement first or is elbow grease the only answer?

Thanks in advance.

[bonfire]

Try to soften the concrete, but do not use active chemicals! The concrete itself is unlikely to severely damage the hood, but traces may remain!