I also tried a rusty pole-wrapping technique described by Kimberly Baxter Packwood at Prairie Fibers with great success. The vinegar speeds up the process so that these were ready in only 24-48 hours.
The rusty pole (above) before the moment of truth when I unwrapped it to find the beauties below :
Sun-burst right off the pole.
Sun-burst washed up.
Also found this little critter in the patterning. I hope he doesn't bite--get a look at those pinchers!