I've never tried it. Any special precautions? Using an Arctic 445 2Watt with burning lens. Bee pretty close to the magnified beam. I'll be using my Eagle Pair OD4+.
Thanks in advance for any tips. Safety first.
That should be more than enough, if I remember correctly steel wool will ignite around 300mW.
EDIT: here's a video by Styro on different powers: http://youtu.be/d1pXhhtUaso
I never even thought of burning steel wool, now I wish I had some to try it. 2W of 445 should be plenty. Take a video if you can, if not then a photo or two if possible.