Best rinsing aid in hard water area?

[GARider]

Hi guys,

Can anyone recommend a decent rinse aid that will be good in a hard water area?

[Ultimate Finish]

use ultima paint guard wash if you really must use unfiltered hard water. I highly recommend filtering your hard water atleast through a 5 micron filter media. Ultimately it is always best to use deionized water as a final rinse....do not wash in sun if you don't filter your water.