5 Best Flap Discs for Cleaning and Prepping Mild Steel
3. A 60 grit flap disc is a general purpose grade. Widely used for preparing mild steel by grinding off rust, mill scale and paint. Also de-burring steel and rounding and beveling edges. And it is used for medium grinding off of your weld bead once you have finished welding as well as removing weld spatter. 4.
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