Clean your tray with mild soap and water and let dry.
Use painter's tape to section off a line to make a stripe (optional). Spray with several coats of spray paint, remove tape, and let dry.
Make a template for the inside of the tray using newspaper or paper and a pencil. Cut out with the scissors and set aside.
Attach the lazy susan mechanism to the bottom center of the tray with E-6000; let dry.
Print out all images you would like to use on a laserjet printer. Cut out and assemble them into a collage (you can tape if needed).
Place the template on top and trace the outline of the circle. Cut out with scissors. Fit in the tray and trim if necessary.
Mod Podge the images into the tray, layering as necessary. Seal thoroughly, making sure to get all edges. Let dry overnight.
Mix the Envirotex Lite according to package instructions. Pour into the tray. Allow tray to fully cure for approximately 24 hours before using.