Here is what the cardboard letter look like close up. If you have letters like a “P” that are top heavy you can cut into the base with an x-acto knife and fill the bottom with some rice or plastic pellets to keep it stable!
First, you will cut your fabric around your letter with about a 1/2 inch border, like so.
Then, get out your modge podge and lay it on thick! Press your fabric onto the modge podge, smoothing it out as you go. Do one flat side, then the outer edges of the letter, then modge podge the other flat side, and then overlap the outer edge to make sure no cardboard is showing.
You will then cut out the inside of the “G” with an x-acto knife and modge podge the fabric to the inner cardboard edges.
Then, cut a strip of fabric that is slightly smaller than the width of your letter’s edge and modge podge it to the inner edge of the letter “G”. This is to help cover all the open spots of cardboard that you have remaining from cutting your fabric around all the corners and curves.
When you get to the corners, again, snip the fabric and modge podge each side separately! You will need to go back and cut a small strip of fabric to cover the little bits of cardboard that remain to be seen.