@suzannebez sorry for the late reply but yes, it does work. I recently finished a patch with mod podge by folding a few strings back at a time, taking a skewer, dipping it into mod podge and carefully spreading the glue over the strings so that they stick to the back of the patch . You could definitely use a popsicle stick, a paintbrush handle, or even your fingers to help the strings stick down to the patch (don't be limited to these three things though, there are definitely more things that you could use so get creative). I would be mindful of how much mod podge you use though because wherever you put the mod podge it will become a bit stiff so if you use too much it will probably make the patch harder to sew onto things like a jacket or a backpack if that's what you're choosing to do with your patch. I hope this helps!