Picklex 20® One Step Metal Surface Prep. Environmentally safe-water based, non-toxic, non-flammable, & water-soluble liquid.  A 100% rust converter & inhibitor, primer, metal surface cleaning and conditioning solution: For both Steel (includes Stainless & Galvanized) & Aluminum. Exceptional rust protection when stored under cover or inside stored: eliminates flash rust problems, no need to prime the metal after forming or fabrication. Coverage: one very thin coat is required: (1) gallon covers approx. 1600 sq. ft. Does an excellent job at converting weld scale and removal as well as scale removal on hot roll steel for better bonding. No after wash required before prime, paint powder coating or welding ( weld joint strength increased and virtually eliminates the formation of weld splatter on treated surfaces).