What to do? Illustrator has a couple of likely tools – roughen and scribble. They don’t really provide any kind of corrosion. In the old days this is what we would have done to age some text; print it on the laser and blow it up on the photocopier a few times at max magnification. Between copies you could rough up the sheets of paper a bit, crinkle it a bit, depends what you wanted.

3000 Recordings

Anyway that was a long time ago. Now it’s easier to use Photoshop and some spatter brushing, the photocopy and stamp and threshold controls, a bit of the dodge tool perhaps. Then you can bring that into Illustrator and vectorise it if you wish to use it in a logo. That’s what I did and I’m pleased with the subtle and realistic results. What do you think?