Mark,
Thanks for your input. I have a source for the thinner white backer rod. It may be the same one you have in mind.
http://www.aloghomestore.com/backer-rod.shtmlThese guys even sell smaller quantities especially to fishermen for making rags. I ordered from them and their service is top notch.
What I'm looking for is a larger diameter material - 3/4 inch or even 7/8 inch or 1 inch.
I have been experimenting with the lighter textured stuff and have found that a thin coat of Plastidip over the whole outside makes what looks like it might be a fairly durable (and good looking) float. I'll report back here when I've had a chance to evaluate the results. I have yet to try shaping it as seen in the tutorial section of Steelhead Notebook.
Thanks again for your help.
zonker