It works a little, limited in most situations. I compare it to old school acid, wait a little, blast away. This is like gel, agatite and rinse. I apply ceramic coated black truck to remove water marks and it worked well.

strongest strength of any of the water spot removers i've tried. only issue is that you need a panel wipe or cleaner to fully remove the residue.

This stuff works amazing and fast.. I tried it on paint and chrome and the water spots disappear with ease! Definitely buying another bottle as back up.