The Brownells 6" Stitched Muslin Wheel is designed for initial metal cleaning to remove old finishes and rust, with a caution to avoid rounding edges or altering holes.
Loose Muslin Wheels are intended for smoothing out grit marks between grit changes and for final surface preparation before bluing.
For optimal performance and to prevent cross-contamination, use multiple sections to match motor width, never mix grits on the same wheel, and clearly mark the wheel with the grit number and rotation direction.