This young lady had the unfortunate task of trying to remove some graffiti - apparently scrawled in indelible marker - from the sign outside her restaurant. She said it's a frequent occurrence, unfortunately, and it can be extremely difficult to remove. She's trying to scrub this sign with "Goo Gone" but other than some black stains on her white cloth, it was having little effect on the graffiti.
Post processing started with a classic filter in Topaz B&W FX. I adjusted color sensitivity sliders, adaptive exposure, regions, boost black, and boost white. A levels adjustment and sepia photo filter were added in PSE.