I'm all about experimenting. I had no idea whether Diamond Art would work on a real pumpkin, so I gave it a try. I'm happy to report that it worked beautifully! This pumpkin will make a great Thanksgiving centerpiece, but it would be even more cool to use mini pumpkins with guests' names on them to act as place cards. In future years, anyway. In 2020, Thanksgiving will be deRosier, Party of Three. Affiliate links below.
Diamond Art Thanksgiving Pumpkin
The first thing you need to do is transfer your design to the pumpkin. I printed out the word thanks, then used a retractable craft pick to pierce holes along the design to give me a guideline for where the gems would go. It worked really well, although I'm concerned that poking holes in the pumpkin's skin will hasten its spoiling. A smarter idea would be to print out the word, scribble on the back of it with a pencil, then trace the word, transferring the pencil marks to the pumpkin.
Next, paint liquid adhesive along the marked lines. Let the adhesive sit for 15 minutes, or until it appears clear. Then start adding dots. I work from right to left since I'm left-handed.
That's all there is to it!