How to make sand white??? :)

[haring]

I am a wedding photographer based in Miami. I shoot a lot of beach weddings. Some of my clients want me to make the sand white. How do you achieve this so it looks great?

I have tried to desaturate the sand however I just don't like how it looks. It looks muddy and not real. How do you achieve the white sand look without traveling to Micronesia....?

Thanks so much!