The antlers will be bone white, VERY sharp and hard underneath the velvet. I shot a one-antlered buck 2 yrs ago, dont really care for the look of velvet anyway, just peeled it off with pliers. Gotta do it relatively quick, before it starts to dry. Wash the blood off the antlers immediately and stain once dried (if you wish).
If you really, really like the look...talk to a taxidermist. Otherwise you can save money, strip it and do a euro yourself.
You can make the antler velvet into magic medicine