Mystery solved!
OK, so for months now I've been singing the praises of Folk Art's Antiquing Polish. Many of you have asked me where to get it, and I happily told you that I found it at Michael's, in the aisle with the other wood stain.
Well, guess what? I went last week to buy some more, and the woman told me that they are no longer carrying it. So that explains why some of you have looked for it, with no success. Instead, the woman pointed me towards this: Staining and Antiquing Medium by Americana (found with the other acrylic paints at Michael's).
You just mix it with any paint color (equal parts paint and antiquing medium), and then use it as a glaze. The antiquing medium makes the paint somewhat translucent, so that the paint from underneath shows through.
Below, you can see a project that I started. On the right side of the box is the non-antiqued part, and the left side is the part I antiqued. Since I mixed the medium with brown paint (Burnt Umber), it gave the paint a slightly brown patina.
My advice would be to rub it on with a wet cotton ball, wait for a few seconds, and then go back with a damp paper towel and wipe until you get the effect you want. Repeat until you are happy with it. Works just as well as my original antiquing polish, but a lot easier to find!
Next I will show you the rest of that box and what I've done with it!