If you want to make easy and organic barnacle murrini for your seashore beads, here is a tutorial for doing so.
You'll need:
2 bent or otherwise cruddy mandrels, at least 3/32
Clear
White
Two types of gray -- I used Fossil Medium and Dark Gray Medium but any grays will do
Black
Pull your black into two or three stringers before you begin. I neglected to do so and had to wing it with full rods.
1. Melt a fair sized gather of clear on the end of one of the mandrels. Make sure the mandrel is red-hot at the end.
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2. Apply a layer of white, making sure the white touches the mandrel entirely and also completely covers the clear on the other end of the ball. Apply a second layer. You can see the second layer being formed over the first:
3. After melting the white into a smooth ball, apply four lengths of the gray of your choice, making sure all four lengths touch the mandrel and each other at the other end:
4. Apply your other gray, making sure it touches the mandrel and each other at the other end:
Hold on for more...