How-to - old paper ACEO / ATC.

Supplies:
Cardstock (light brown)
Antique paper
round corner punch
Antique advertisement / scrap images
Glue / xyron machine

Cut cardstock and antique paper to identical ACEO / ATC size (3.5 x 2.5"). Glue cardstock and carefully align and adhere the antique paper to the glued side. (Or glue by running cardstock through xyron machine.)
Also glue and paste cut out vintage image and lettered stamp on top of the antique paper surface. Smooth down. Allow to dry.
Antique papers, and unique papers are available in my DreamyPapers shop on Etsy.

ATC / ACEO Display or Gifting Idea.

This is one of those times that carrying a playing card around with me, paid off. This paper-mache ornament is a great size for displaying or gifting an ATC/ACEO. I saw these in Michaels Craft Stores around Christmas time one year.

Paint, collage, or decorate the ornament anyway your heart desires. Add some 'bling' - maybe sparkling rhinestones around the edges. Then use photo corners to attach the card to the surface. Or you may find other creative ways - there are all manner of clips and other items to use - miniature clothes pegs, or butterfly clips, for instance.