After inhaling something greasy or sweet at the Uptown Art Fair this weekend, do your skin a favor and visit the Dermalogica Air Stream Trailer, which will be parked in Uptown Friday, Aug. 7 to Sunday, Aug. 9 offering free consultations. Hop aboard for free skin analysis (to reveal your skin's past, present and future), advice on improving your skin and complimentary product samples. For every person who comes through, Dermalogica will donate $1 to the Skin Disease Foundation.