Recently we had a Carrick Camera Club shoot on Annestown Beach, and one of the shots involved lighting steel wool and doing some fast revolutions of the item while at the same time having the camera setup on long exposure.
I was using Bulb, averaging 50 to 80 seconds and one of the results is shown below. Its a nice effect and more of these can be seen on my Flick channel.
If you are doing this yourself, please be careful as there are plenty of bits of hot metal which can fly around. Don’t forget to use a tripod, turn off Mirror Lockup, use a cable release and bring a flask of tea as it gets fairly cold on a beach during this time of year. Enjoy!