I've covered a few light switch plates in my time, (you may have seen mention and a photo in an earlier post) but there is an even easier way than Mod-Podge. Yep, I'm calling Mod-Podge the hard way because it requires a brush and waiting for layers to dry.
I took my plain white light switch plate off the wall and sprayed the front of it with adhesive.
Then I placed it face down onto patterned paper.
I clipped the paper at the corners and encouraged it to wrap around the plate, sticking to my sprayed edges. This corner is near enough cut in a square, allowing the piece to cover the corner to be separate from the sides.
Then I used packing tape to attach the folded sides over to the back of the plate. Packing tape is stronger than scotch tape. (although my packing tape is scotch brand :)
Then I took it outside and gave it a couple layers of acrylic spray finish. Waiting between each layer for the recommended few minutes.
Then I used a retracted ball point pen to lightly push the paper into the screw holes without breaking the paper. And I put it back up!! The whole thing took me about 40 minutes, and that's waiting for the layers of finish to dry. It was sure a lot quicker than trying to get a smooth finish with Mod-Podge. (Which by the way is very handy to have around!!!)