Posted on Resin Crafts Blog Previously How to Make Letterboard Letters with Resin! Learn how to make letterboard letters with FastCast resin in just minutes. Letterboards are so much fun for parties and occasions, but sometimes don't come with enough letters or you need some custom letters made. Learn how to make your own resin letterboard letters using FastCast Urethane Casting Resin, some toothpicks, stick-on jewels and just a few minutes! I bought some small letterboards but they did not come with any letterboard letters. I decided to make my own letters using Castin’ Craft FastCast Resin. This type of resin cures fast, in just 15 minutes. It dries white, not clear, so it’s great for resin applications that don’t need to be see-through. This resin project also works great if you are doing just a few specific letters, rather than trying to mass produce every letter in duplicate for future use. If you have a silicone mold, you can turn anything into a letterboar...