Do some of you do this after a show? horse question..?

so back in the summer i was around my barn after some of the girls and my old trainer got back from shows, and i went to one of them just to watch and help, but they had sprayed their horses legs with diluted rubbing alcohol, then wrapped the legs with pillow wraps (quilted wraps) and standing wraps. i remember asking my trainer what that was for but now i forget, do some of you do this after shows, if so why do you di it? oh they did dressage and mini trials, and hunters for shows, a mini trial is like a 3 day event but on a smaller scale, short(length wise) courses and patterns and its all on one day no nasty answers please!