This thesis investigates wood surface treatment with a focus on simulating and analyzing failures that may occur during this process. The introduction defines wood surface treatment and its significance in achieving aesthetic appearance and increasing the durability of wood products. The research objective was to simulate and analyze common errors that occur during wood surface treatment, studying their causes and implications. The experimental part of the study aimed to simulate selected failures and thoroughly document their characteristics on representative samples. The research conclusion highlights that the experimental results have confirmed previous theories and hypotheses regarding errors in wood surface treatment. Data analysis after the experiments provided a deeper understanding of individual errors and their causes, emphasizing the importance of experience, training, and the application of expert approaches in reducing the frequency and severity of errors. Furthermore, the research underscores the importance of proper surface preparation and the application of appropriate wood surface treatment techniques to ensure product longevity and aesthetic appeal. Through error analysis, the research provides guidelines for improving practices and managing production processes, with the goal of enhancing productivity and work quality. The key research finding is that identifying the real causes of errors is crucial for their resolution or prevention, which can significantly contribute to improving product quality and reducing costs in the wood surface treatment production process.