PSA Stands for Pressure Sensitive Adhesive. These are generally self-adhesive sanding discs that immediately and simply attach to some sanding machine. Obtainable in either cloth backing or paper backing with fabric being used for heavy responsibility grinding and paper remaining a far more affordable and light-weight choice for lighter sanding/finishing. https://www.pinterest.com/pin/1001488035878386419/
Silicone carbide 9x11 120 Secrets
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