Um, gray, just gray. Because of the way that gray works, once they start the fading process, it can be very hard to decide what the base color might have once been. It could have been a bay or maybe a buckskin. As for brindling, maybe...maybe not. Gray can do some funky things to a horse's coat.
I'd even be willing to bet that the white spots are nothing more than another expression of the gray gene at work. It's just like this filly that I rode about 12 years ago
Deinitely grey. The spots are Chubari spots, and they appear in some greys but not all. They are different to Birdcatcher spots as Chubari's are part of the greying process. The striations on the barrel are also the work of the grey gene. It's almost like the grey wants to give us really whacky looking horses to make up for them being "boring" once they have greyed out completely.