Hi Juan, thank you for your review. I'm sorry to hear the Exterior Ultra Paint had peeled, and I can understand how frustrating this must be. As it turns out, this paint is not recommended to be applied directly to plastic surfaces. To fix this, I recommended removing any loose coating by scraping or sanding with 80-grit sandpaper. Then sand smooth the edges, clean the area, and allow it to dry. Once dry, prime using our Bonding Primer No. 432, and touch up or re-coat the area with Exterior Ultra. Your satisfaction is important to us, and we appreciate your feedback. Please reach out to us directly if you need further assistance. Our customer care team is happy to help you! - Randy