In most seismic processing flows multiples have been considered as noise and, therefore, are discarded after the removal process. In this paper it is argued that multiple reflections contain a wealth of information that should be used in seismic processing to improve the resolution of reservoir images beyond current capability. The proposed method, multi-channel weighted cross-correlation (WCC), in combination with surface-related multiple elimination (SRME) allows the transformation of multiples into primaries for surface seismic data. The latter means that nonlinear seismic imaging can be implemented by a number of linear steps.