abrasive jet stream cutting , wherein an abrasive is suspended in a flowable jet medium and projected at high velocity and pressure at a workpiece is substantially improved by forming the medium of a polymer having reformable sacrificial chemical bonds which are preferentially broken under high shear conditions . projecting the medium and suspended abrasive breaks the reformable sacrificial chemical bonds while cutting . the chemical bonds will reform , permitting recycling of the medium and abrasive for reuse in the method . the jet is effective at pressures of about 14 to 80 mpa .