Step 7: Sand the edges of the template
Take this moment to clean up the edges with sandpaper. Use something rougher if the saw marks are deep. Eighty grit should be fine for most marks unless your template is made of a hard wood.
Remember to sand evenly. Hit all of the sides and make sure to keep the paper flat against the wood, or you'll make it curved.
Making this template is important because all of your flip-flops will be copied from it.