A metal surface cleaning process accomplished by movement of a multi-flame oxyacetylene torch over the surface. The quick, intense heat causes deposits of oxide, rust, scale or old paint, to be consumed or loosened so that they “pop off’ easily. When a workpiece is being primed for painting, the surface may be swept or wiped free of loosened foreign material and painted while at an elevated temperature. This improves paint adherence and extends the life of the paint.