I sent the postcard rewards out on the Wednesday before the opening, and you likely have already received it. The postcards are altered from original cards that are on sale at the Menil Collection in Houston. I've titled the series of alterations "Postcard (Re)Constructions" to go along with my "Postcard Constructions," an original continuing series of mail art postcards.
The materials vary by work, but the intended top of each work is indicated with a red arrow on the verso of the card. All the dings, scratches, stains, and little printed bar codes that are indicative of the gentle ministrations of the mails are intended as part of the work.
Please feel free to post pictures of the final result as it arrived on Twitter, it's always nice to see how things showed up.