Flip presents the Perfect Canvas Clean Primer by REN Clean Skincare, as reviewed by Melanie. In the video, Melanie demonstrates her application process, starting with a few drops directly on her face after skin preparation. She rubs it in generously and proceeds with her makeup routine. The primer is shown to create a smooth canvas for makeup application. The final look appears flawless. Overall, the Perfect Canvas Clean Primer seems to be effective in providing a good base for makeup, ensuring a long-lasting and polished finish. However, the review does not mention any potential drawbacks or specific benefits of the product.