Mod Podge is one of the most well known craft supplies in existence (you might recognize it from its retro label). But if you aren’t familiar with Mod Podge, it’s a decoupage medium — an all-in-one glue, sealer and finish used to attach paper and fabric to various surfaces. READ: 5 Must-Do Mod Podge Projects Crafters use it for all sorts of projects, ranging from home décor to jewelry to gifts to budget crafting. (For more great crafting ideas, follow us on Pinterest) One thing that most…