I'm creating a psychedelic art car for daily driving, and would like to put fake flowers on the interior roof so that passengers don't have to look up to ugly felt, but rather, to a pretty floral collage. However, what would be the most effective manner of doing this? With a hot glue gun? Spray adhesive? Sewing the flowers into the felt? I don't want to create something beautiful and then have it disintegrate in a month due to gravity. Thanks for your help! Well, the car is 10 years old and the headliner is perfect. It's too bad I couldn't afford some old 60s car, but with my pay, I can only purchase paint for my current piece :P