ah, HERE'S how to get those crisp paint lines - great trick! Modgepodge the vinyl letters down. THEN paint over and peel off. Paint doesn't seem in over the modgepodge.
Mason Jar Craft - Mod Podge Sheer Colors use jars to store craft items and flowers
Top 10 Mod Podge craft tutorials of 2013 - Mod Podge Rocks