Yes we can however hard water damage is very bad for car paint, water spots when heated up will etch as deep as the metal and it requires heat treatment and many hours of correction to remove generally. When water spots are compounded out the first time by machine, they appear gone but after heating up the paint or adding a coating with a strong solvent, they often come back. This is a wash, rinse, repeat process, we do this procedure of compound, IR cure and then compound again until the spots stop coming back, this can take 3 or 4 times or 10 times or more. For water spot removal we charge additional by the hour. It is unfortunate but a harsh reality in california.