Hi Jiri, thank you for your question. I'm so sorry to hear about the wearing that has occurred. That is not the experience we want for customers, and I can understand your disappointment. Based on the pictures you provided, it looks like there may be some tannins bleeding through along with the peeling. To get your project back on track, I recommend removing any loose coating before making sure that the surface is clean and dry. Then, prime the wood with our stain-blocking Multi-Surface Primer (No.436) to seal the surface before recoating the railing. Your satisfaction is important to us, and we want to help turn this around. Please reach out to us directly so we can learn more about your project and assist. We look forward to hearing from you! -Lina