From Sand Paper to Silk: The Science of Smoothing Pool Plaster

Have you ever stepped into a pool that feels like sandpaper under your feet? Rough plaster is one of the most common frustrations for pool owners. Beyond comfort, surface texture affects water quality, maintenance costs, and the long-term health of the pool.

This guide explores the science behind rough plaster and how professional polishing can transform it into a smooth, silk-like finish.

Why Does Pool Plaster Become Rough?

1. Water Chemistry Imbalance
   
   • Low pH or alkalinity can cause etching, stains, and surface breakdown
2. Poor Mixing or Application
   
   • Excess calcium chloride or rushed troweling leads to micro-cracks and porosity.
3. Improper Curing
   
   • Without controlled curing, the surface remains weak and prone to scaling.
4. Structural Issues
   
   • Cracks in the substrate or improper bonding create uneven texture over time.

The Science of Smoothing: Effective Methods

• Diamond Polishing Discs
  Specially engineered for pool plaster, diamond discs remove roughness without damaging finishes or pool chemistry.
• Step-by-Step Polishing Process
  
  1. Start with medium grit (50–70) to level the surface.
  2. Progress to fine grit (120+) for a silky smooth finish.
  3. The Coyote Hydrotorque does not produce dust and does not burn finish since it is a water assisted polishing tool
• Proper Post-Polish Curing
  Brushing daily and balancing water chemistry are essential. Up to 60% of plaster strength develops in the first 30 days of proper care.

Prevention & Long-Term Care

• Maintain Balanced Water Chemistry
  
  • pH: 7.2–7.6
  • Alkalinity: 80–100 ppm
  • Calcium hardness:  100-150 ppm
• Brush Regularly
  Helps remove mineral deposits and prevents scaling.
• Replaster When Needed
  If roughness is severe or cracks appear, complete replastering may be required for structural integrity.

Conclusion

Turning pool plaster from sandpaper to silk is not magic — it’s a science. With proper tools, proven polishing methods, and water care, pool professionals can ensure every swim feels smooth, safe, and luxurious.

👉 At Coyote, we specialize in delivering professional-grade tools and solutions to make this transformation efficient and lasting.