Citric acid has been used as a mild bleach for wool and cellulose fibers. It may remove fresh, light iron rust stains but prove ineffective on old stains. Salt may be used as an abrasive for cleaning, but it can scratch some metals and plastics. Vinegar will act to neutralize bases that contain alkaline soaps. Vinegar will also cut greasy films on surfaces but will pit marble surfaces.
White vinegar is safe for use on all color-fast fabrics other than cotton and linen.
All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status. Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.