The resin may have made the texture a bit smoother since most of the voids were filled, but it still has a rough feel to it similar to the texture of a granite river rock. Not glass smooth, but it's not going to rub the flesh from the bone either.
Will this be a face lathering brush? My fear would be that it would experience wear when or if it comes in contact with the bowl or scuttle. But like others have mentioned, you've done some great work to the coral.