Some warts will start bleeding with even light brushing of the coat around them. Missy has one like that on her back, so I don't even brush her coat. I use my HV dryer, then clip her (she gets a 4f all over) and just use my comb gently to fluff and clip till it's even. She doesn't get long enough to get matted and her coat is the type that this works well.
Happy Tails Missy! Enjoy the spring sunshine!