G. A. Tremain & Co. is a custom framing shop and studio in northern Evanston. One look at this space indicates catering to an upscale market. Frames on display by the owner, Steven Citron, are worth just as much as the art inside of them. In business for more than 10 years, Tremain has prospered through positive word-of-mouth and return customers. The staff is happy to chat about the many aspects of properly framing nearly everything.