I am thinking about including several Manzanita branches in my current project, from manzanita.com. It looks as if most here get theres sandblasted but I have seen a couple that werent. Is it advisable to get them sandblasted? Will more tanins leach out of the natural ones? I'd really rather have the darker color rather than the bleached-out look, or do the blasted ones darken up once soaked and aged in water?