:nono: There are some water spots that i couldn't remove from my car, what compound should i use to remove it?

I would try a 50/50 mix of distilled water and vinegar first. Let it sit a few minutes and try wiping off. Then a clay bar after that if it doesn't come off. I had some stubborn water stains that wouldn't come off, but the clay bar took it off. If it's really set in, you might have to use some polishing compound.