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Sanding Disc Core Elements: Expert Field Guide, from NOVO. Grain Best Fit, pressure level Watch Point and zirconia alumina Carbon steel, welds, heavy deburring are among the specifications published.
| Grain | Best Fit |
|---|---|
| Pressure Level | Watch Point |
| Aluminum oxide | Wood, filler, primer, mild steel |
| Zirconia alumina | Carbon steel, welds, heavy deburring |
| Medium to high | Needs pressure to self-sharpen |
| Ceramic alumina | Robotic sanding, alloys, weld blending |
| Light to medium | Sharp but more friable |
| Finish Target | Practical Grit Range |
| Typical Use | Watch Point |
| Heavy removal | P36-P80 |
| Surface preparation | P100-P240 |
| Fine finishing | P320-P800 |
| High-gloss prep | P1000+ |
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