I took a recent CLE-ORF flight in an unmarked CHQ aircraft. I know CHQ has several unmarkeds to shuttle throughout the fleets of their customers. The aircraft I flew has seen its share of paint jobs:
http://www.airliners.net/search/phot...gsearch=N276SK
Most frustrating was the CHQ seat assignments. At check-in the E145 was listed as A-D-F for seats. Of course the CHQ unmarked that arrived lists seats as A-B-C. Confusing most travelers on board.