I got a bow for Christmas. I'm new to bowing (have played bluegrass up until now), so I have a couple questions about rosin: 1) can I use the rosin that I've been using on my violin bow? Or do I have to use bass rosin? 2) if violin rosin is bad and I've already put some on the bass bow, do I need to try to remove it somehow? Or can I just put some bass rosin on top?