Hello. I am not very handy with cars, but have noticed some early signs of creasing within my C70's sport seats. I want to be proactive on this matter to ensure longevity and condition. Has anyone tried the leatherique product? Is it easy to apply? What is the worst case scenario if things "don't work" with the product? Can the product cause any harmful issues to the seats? How much does one need to complete one seat? Thank you in advance for your insight and perspective!