UHU Stic - I find that Gel medium or Mod Podge often cause wrinkles and air bubbles. So I will use a UHU stick every time a need to cleanly glue something down. I also prefer not to wet my surfaces too much. Wet = bubbles, warping and wrinkling. Plus when using a glue stick the surface remains absorbent unlike when it's covered in gel medium. Sometimes I want that.
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