I feel your pain. I love greys, but didn't buy my horse for his color. He's been really lightening up which is pleasing to me, and I had hoped that he would go white like his sire, but he's getting flea bitten.
I'll gripe along. Here is what I wake up to most days...
Not only is he fleabitten, he loves water, and mud, and dirt, and whatever else will stain and cause me hours of grief. I've given up. Yes, that is the "dirty horse", look over here at the shiny one, please!!
I'll be interested to see what color my colt turns out to be. As a five-year old, he still has a gorgeous steely coat. His dam is my mare's half sister, who's also flea-bitten. His full brother is still dark and dappled at age 7, so I'm keeping my fingers crossed for long-lasting dapples!