Flux Cored Arc Welding (FCAW) is usually referred to as gasless welding or flux-cored welding. A flux core welder is similar to MIG welding as the welding wire is fed from a wire spool through the welding cable to the arc area in the same manner and uses the same feed mechanism. Flux-cored welding does have benefits in regards to the metals being welded. They are able to weld better over less prepared surfaces, although excessive dirt and grease should be removed. Flux core welders are also good for welding galvanized steels. In general, the finished welds are neat in appearance however there is a flux/slag coating on the finished weld that needs to be removed.