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Thoroughly washed the vehicle followed up with clay bar. I started the graphene on the rear window, tailgate, bumper, and it produced the rainbow effect as shown in the YouTube video. Next, I moved to the rear quarter panel, applied the graphene, then started to wait, and wait. I might have waited twice as long as I had for the rear section. The product was easy to remove and the paint looks great! I was working in my garage and the rear had a lot more natural light, but not in direct sun light. It was ~95 degrees out with humidity ~80%. Made sure to thoroughly shake the bottle before using. Could the lack of rainbow effect be the lighting in the garage or could it be something else?