Stuck at an event without blotting papers, and looking like the Exxon Valdez took a spill on your face? Slip off to the bathroom and use a toilet-seat cover to sop up oil without removing makeup. It’ll work as well as an oil-blotting sheet and is obviously free…it’s just much less glamorous!
Something else that I’ve found that will work if you’re desperate is the really crappy single-ply toilet paper. That’s all they have at my university so I would frequently use that instead of my ridiculously expensive blotting sheets for getting rid of my oiliness. Thanks for the tip!