Using freezer paper for painting stencils on fabric has to be the most brilliant idea ever thought of! Whoever thought of it should have their own holiday dedicated to them. If you’ve never bought freezer paper before, you can find it at most grocery stores in the baking section with the tin foil, wax paper, etc.
Okay so the first thing you do is figure out what design you want to paint on the fabric. The possibilities are endless, from images to font. For the onesies I made I decided to paint a pair of aviator sunglasses. I found a picture online of the sunglasses. I then cut a sheet of freezer paper to the size of normal printer paper (11×8.5 inches). You can then feed this piece into your printer and printer the image you found online. You could also free-hand an image if you’d rather. I printed the image of the aviators out onto the freezer paper. Make sure you are printing to the side of the paper that doesn’t have the glossy texture or else this won’t work.
Once you have your image printed, use a box cutter or exacto knife to cut out your image or words. I want to stress that the “background” of the image (or the 11×8.5 sheet minus the image) is what you are using as your stencil, so make sure you aren’t cutting into this. Take your freezer paper and iron it onto the onesie. The fabric should be showing through the area of the paper you cut out, and this is what you will be painting. Make sure you have something inside the onesie to protect from the paint bleeding through. Now you just paint away (using fabric paint or acrylic paint works too). You can peel the freezer paper off right away or you can wait. I prefer to do it right away but make sure not to get any of the wet paint on any unprotected areas of fabric.