I got 'em....bad. Tried everything! Even glass cleaner & rubbing alcohol. Is there any solid way to get rid of hard water spots. I have a jet ski and the lakes water gets on the ski and the L. The water spots left over from it are like granite! Something non harmful preferrably. Thanx guys.

 

Try a 50/50 mix of vinegar and water. It should break down the mineral deposits. I've also had great luck with clay on those really stubborn spots.

HTH,
Edward

 

Zaino Z-18 Clay Bar....I use it on my SeaDoo as well.

 

I used to drive a black 93 L. Same problem! Bad! Tried everything!
They will come off with a lot of rubbing! I'm lazy, didn't like that!
Here in Oklahoma, they have the spot free rinse, at the car washes. Tried it after washing! Hmmmm, Strange, the spots are gone!!

Albert