Cover the entire pen! I like to start at the end and work towards the pen tip.
You might have to trim the extra off at the end.
Once it it all covered I like to gently roll it back and forth to make it smooth. The canes will distort a little bit. I recommend (if using sculpty or premo) to bake at 250 for 15 minutes. It is better to go a little cooler so your pen doesn't melt! Once it is done and cooled, you can sand it a little bit to make it a tad smoother. I like to use wet/dry sand paper at the highest I can find (usually that is 600). Once sanded, I use a glaze and cover the entire pen. It makes it nice and shiny and I think it helps from cracking over time. Then just put the ink back in and your done!.
I made the leaf pen a long time ago and have been able to change out the ink and use it over and over again. This can be a good project for young kids to do. A simpler option for them would be to have them cover the pen in one color clay and then have them wrap a long "snake" around the pen and then roll it smooth.
