Go from LQ to HQ!

[Danger]

[Pieter]

This looks good, though probably too complex for my PS skills. I'll remember it in case I ever need it, though.

[Danger]

Topaz is also an option, but that's if you want to have the Topaz effect on the entire image.

[Danny]

If you use Topaz properly then it's a really great tool for cleaning up signatures.