I have used the Bausch and Lomb headband magnifier, similar to the Donegan mentioned above, at work and have tried the Mageyes magnifiers at home.
http://www.mageyes.com/default.htm
The common gray headband style worked well and can be had in different magnifications, and some come with interchangeable lenses. We had plentiful light and I've not tried the ones with built in lights.
The Mageyes are lighter weight and do pretty much the same job, but are more comfortable for long wear, like an evening tying flies, but they're not as sturdy, or as stable when you're moving your head a lot.
One huge problem with the headband magnifiers is that the stronger the magnification, the shorter the required distance between your face and your work. Also, the range of distance where you can see clearly gets pretty narrow. When you're crafting, this isn't much of a problem, but with woodturning, you can't safely get your face 9" from the work when it's spinning on the lathe.
For most situations today, I just use a stronger pair of reading glasses, and only resort to the headband if I need greater magnification than 3.25 (diopters, not X magnification).
For surface decoration, any of the above should work fine, though with high magnification, your nose might get a little toasted doing pyrography.
