Andrew. As Ken posted, what type of velour. You need to find out if it is wet cleanable or needs dry cleaning.
Take a cushion off a chair and dribble a bit of water on the fabric at the zipper end, hold your thumb on the fabric for about a minute. If the pile stays flat then it's a velour...........DO NOT WET CLEAN.
If it's a Viscose or Acrylic then you can wet clean safely. Hope this helps.