Very fine abrasive powders you can use to “rub in” parts. Make an abrasive/cutting-oil paste for metal work or use dry on a soft pad to bring a cured stock finish to a gloss. Follow with Brownells Stock Rubbing Compound.
Big Book Catalog, Issue:68, Page:424
Big Book Catalog, Issue:68, Page:426
Big Book Catalog, Issue:68, Page:498
SPECS:120 grit (coarse); 600 grit (fine). 1 lb. net wt. in plastic jar.