Steel should be cleaned of any oil, grease, paint, and rust before using any arc welding process. However, if complete cleaning cannot be performed, consumables that form a slag, have deeper penetration, are slower freezing, or have higher Silicon and Manganese are recommended for dirty steels. These consumables include:

SMAW: Fleetweld 5P+

GMAW: SupraMIG Ultra, MC-710-H

FCAW-GS: Outershield T55-H

FCAW-SS: Innershield NR-311

SAW: 761, 780 fluxes "