Review on 🔸 3M 909NA 3P CC 1 Inch Medium Sanding: High Performance for Superior Finishing Results by Zach Peterson

I tried using these sponges on some acrylic sheets for a project but they don't last very long. For one project I had to use two of these sponges as they wore out quickly. I went to Harbor Freight and bought 10 packs (same price) of abrasive sponges; One sponge has done the same amount of work as two of these 3M sponges and that's only 60% of its lifespan. Save money and buy HF sponges if you have them in your area.