What would you recommend to give one side of a clear sheet like lucite or
>plexi a "frosted" appearance? I need it to be as even as possible - i.e.
>without visible striations/unevenness when held up to light, and little or
>as tiny a grain as possible (*no* grain would be ideal) for projecting an
>image onto one side.
>
>I thought about sandblasting, is there an off the shelf chemical that would >do this?
>
Try your city's silkscreen printing supplies shop. They carry thin plastic frosted plastic films (and other birght color translucent films) used for sign making. Some make even be self adhesive. Else you can use spray on adhesives.