Poke a hole in the bottom of a Styrofoam cup and insert the pen holding the ornament into the hole and set aside to dry. When dry, use a paintbrush to add a generous second coat of Mod Podge or glue. Then roll again in the epsom salts. Let dry completely, knock off any excess and add a coat of sealer. After you have the fabric centered on the wooden coaster, in a daubing motion cover the fabric with the mod podge glue completly. This will dry clear so don't worry about the look of it as of now. Make sure you coat the edges of the fabric very well so that fraying does not occur. Clear Nail Polish . Coating origami with clear nail polish is, by far, the most economical waterproofing method for small pieces. You can often find clear nail polish for $1 to $2 in drugstores or discount stores. This technique is used to seal and protect rolled paper beads before stringing them onto necklaces, bracelets, and earrings. For thin material such as paper, maps, magazine articles, we recommend that you apply a coat of elmers glue over the items first to seal them as the epoxy can soak through and discolor them. You may also use a crafter paper coating called Mod Podge that is sold at Walmart or on Amazon.com. And I WILL experiment with modge podge, as I have both of these items in my art journaling studio. I was recently exposed to “Gel” nail polish which is cured under UV light. Since I have THAT system, will try it, as well! Thank you for all the GREAT ideas, and thank you for posting all those wonderful pictures of Frankfurt, Germany!!!! ive done a few, the most user friendly option as you put it would be the 2 part epoxy method. clear coat and paint as we do it in hydrographics takes a lot of expensive equipment and expertise that developed over time. the mod podge works quite well on cups provided you allow it to fully dry before you seal it in. the 2 part epoxy is super durable and again were talking about a cup. unless ...