To address coarse particles in pebble paint, first inspect the mixture for over-saturation or improper particle size distribution. Use a vibrating sifter or high-frequency blender to uniformly redistribute particles. Apply a pre-mixed commercial texture additive designed to bind fine aggregates to the paint matrix. For existing surfaces, lightly sand high spots with a 120-grit abrasive pad before reapplying pebble paint. Ensure all tools and materials meet ASTM C926 standards for durability and particle consistency.

The primary cause of coarse particles in pebble paint is inconsistent aggregate-to-paint ratios during manufacturing or improper mixing techniques. A 2021 study by the National Paint and Coatings Association (NPCA) found that 42% of texture-related defects in commercial coatings stemmed from improper particle distribution, leading to 30% higher maintenance costs over five years. The American Society of Testing Materials (ASTM) specifies that pebble paint must have a particle size range of 50–200 micrometers to ensure smooth application. Overly large particles disrupt the paint’s adhesion, as noted in a 2019 report by the U.S. Department of Housing and Urban Development (HUD), which linked coarse particles to 25% failure rates in moisture-prone environments like bathrooms and basements. Additionally, the Occupational Safety and Health Administration (OSHA) mandates that sanding operations to remove coarse particles must use enclosed systems to prevent airborne particulate exposure, as improper handling can result in respiratory hazards. Proactive quality control measures, including particle size testing and adherence to NPCA’s mixing guidelines, reduce defects by 60%, according to NPCA’s 2022 industry survey. Implementing these steps ensures compliance with U.S. building codes and extends product lifespan by up to 15 years.