x2 what Steven said. Stay away from the ultra bright. Several places online sell BMF. When I go up to Grand Rapids, MI to visit my Mom, I always go over to Rider's Hobby Shop. They sell BMF for $6.99 and I usually buy 3 or 4 packages of it. They might to mail order too.
I use make up applicators to burnish BMF. They're wrapped tighter than regular Q-Tips. One end is wide and flattened while the other end is pointed. I use ONLY Walgreens brand.
AD Lassiter (Cranky Old Modelers on FB) makes a fantastic little tool to run along the seams to make cutting easier. Some people also use sticks with a chisel point purchased from Michaels or Hobby Lobby.