Water dispersant on acrylic domes?

[scuba e]

Any recommendations of a water dispersant for acrylic dome ports? I am going to be working in the surf so there will be repeated dunkings followed by the need for a clear, spot free shot. The amount of sand in the water wont allow me to wipe or touch the dome.
Thanks,
Erik

 

[bvanant]

Don't use Rain-x or you will not be happy after a while at all. You can use RVR rain repellant or cut raw potatoes.
Bill

 

[scuba e]

. You can use RVR rain repellant or cut raw potatoes.
Bill

Thanks for the reply. As far as the potato comment, and I know I'm leaving my self wide open here, is that for real? Do you rub fresh slided potato on the dome?

Thanks again,
Erik

 

[Nemrod]

Pure carrnuba wax. And only if there are no coatings on the dome.

N