How to Use Pool Plaster Discs
- Attach the disc to a 7″ hook & loop backer pad (AG7529).
- Work in 5′ × 5′ sections, keeping the pad flat to the plaster.
- Start with 50 or 70 grit; move to 120 grit for the final finish if desired.
- Vacuum or rinse between passes to control dust and heat.
📘 For detailed resurfacing instructions, see our Pool Plaster Resurfacing How-To Guide .
Which Grit Do I Need?
| Grit | Purpose | Best For | Finish Result |
|---|---|---|---|
| 50 Grit | Heavy removal | Very rough plaster, scale, sharp edges | Exposed but smoother surface |
| 70 Grit | Medium smoothing | Moderate roughness, Step 2 after 50 grit | Smooth texture — often “good enough” for pools |
| 120 Grit | Fine finish | Spas, premium finishes, final polish | Slick, polished surface — preferred in spas |
Frequently Asked Questions
Do I need water? Dry use is recommended. Wet use requires a water-fed tool.
Will these discs rust? No, they use a non-corrosive diamond matrix, safe for salt-water pools.
What tools do I need? A 7″ variable-speed polisher/sander and the AG7529 Velcro backer pad.
Is 70 grit smooth enough? For many pools, yes — 70 grit leaves a safe, comfortable texture. But spas and high-end finishes often go to 120 grit for a slicker feel.
⚠️ Safety & Usage Tips
- Do not exceed 3,500 RPM.
- Use a GFCI-protected outlet.
- Wear safety glasses, gloves, and a respirator for dust control.