A few months ago I bought a "painting"(it's just printed to look like a painting on canvas) with the intentions of doing something with it, the main idea being something with text, but I couldn't decide what I wanted the words to be. And then one day it dawned on me. "Mahal kita." It means 'I love you' in tagalog.
I printed out the letters, cut them out with an exacto knife, used spray adhesive to temporarily adhere the letters in place, painted a rough layer of white acrylic paint (I wanted to be able to see the brushstrokes and to somewhat see the image underneath slightly), and then peeled off the letters to let the old "painting" show through.
Unfortunately I forgot to take some before pictures, but the image was basically a garden with a stone path running through it.
I love how it turned out. I totally want to go back to the thrift store now and get more paintings to redo!