OK all you fiber laser owners ...
A customer sent us a giant (4 foot diameter) saw blade, probably from a lumber mill. It's been outside rusting for decades, and he wants us to engrave a photo onto it. When done, they'll display it indoors.
Do any of you have experience fiber lasering onto rusted metal? They do not want it cleaned - the rustier, the better as far as they're concerned.
We called Epilog but their suggestion was "try steel settings." We can do that and also will likely find some old rusty stuff to experiment on, but help from anyone experience with this is appreciated.
If your name happens to be Rusty, I'll give special consideration to your advice!