Lol. Well I've already given her a bath on the first day I met her (with the owners supervision) but yeah she is really dirty. Its like the dust is in her, there is no end to it haha. I groomed her reallly well yesterday dry and it just kept coming. I'm going to scrub her up the next.warm day we have. And sorry about the title I'm on my kindle.
Buy some Cowboy magic or Lasersheen (my favourite!) and spritz some on your horse, leave to sit for 5 minutes, and scrub with that curry and whack it clean afterwards (on your leg, on a post, on the wall) so that you aren't putting the dust and dirt back into the horse.
After you curry, then use a body brush (I like to use a stiffer one first, then a softer one) and brush that dirt off, then clean the dandy brush with a metal curry or the rubber curry. Brush more dirt, clean the brush, brush more, clean the brush. The cleaner the brush is going onto the horse, the more dirt stays OFF of the horse, and the quicker you get them clean.
Once you do that, I like to take a very soft face brush or a terrycloth rag (favourite!) and finish off just stroking the horse nose to tail, picking up any last debris.
Trust me.. I have a 89% white, rest is chestnut horse. Any dirt is visible.. and I am the queen of scrubbing clean haha.
For the mane, I like to spray conditioner/detangler (Lasersheen doubles as a detangler too!) and let it sit, then I spray some on the hair brush I'm working with. Start at the bottom, get all of the knots out, and slowly start moving up.
Same deal with the tail. For the forelock (the bangs in the front) you never spray the hair.. you spray the hair brush ONLY and do the same thing (start from the bottom move to the top.)
My horse personally loves his face being scrubbed (yes.. scrubbed lol!) but some don't.. so it's good to use a very soft curry and try to get out as much as you can, then use the face brush to flick the dirt off, finish off with a terry cloth.
Hooves.. I like to brush mud off of the outside. Sometimes I even run the hose and soak his hooves then they'll be dry by the time e get to the arena. I don't put any sort of dressing on his hooves but I do a thrush-preventative after picking his hooves and brushing excess dirt away from the frog.
I always wash my curry after I use it, and I rinse out my brushes once a week.