A method for producing a composition comprising: a) providing a plurality of inorganic hollow microspheres having an outer surface, b) coating at least a portion of the outer surface of the inorganic hollow microspheres with a polymerizable or polymeric coating, c) solidifying or curing the polymerizable or polymeric coating on the outer surface to form a resilient polymeric coating, whereby a plurality of sacrificial microspheres having a resilient polymeric coating are formed; wherein coating and solidifying or curing is selected from (i) treating the hollow microspheres with a solvent or waterborne solution of a polymeric material and removing the resulting solvent or drying; (ii) treating the hollow microspheres with a liquid monomer and a polymerization initiator and, after treatment with the liquid monomer, polymerizing the coating using actinic radiation or heat; and (iii) treating the hollow microspheres with monomer that is polymerized using a condensation polymerization; d) providing a plurality of the sacrificial microspheres having the resilient polymeric coating to a melt processing device, e) providing a polymeric material to the melt processing device; and f) melt processing the plurality of sacrificial microspheres having the resilient polymeric coating and the polymeric material with the melt processing device to produce a composition, wherein the polymeric coating includes filler selected from conductive carbon and nanotubes, wherein the term "melt processing" refers to applying thermal and mechanical energy to melt process a polymer or composition, such as techniques including compounding, extrusion, injection molding, blow molding, rotomolding, or batch mixing, wherein the term "sacrificial microsphere" refers to a hollow microsphere upon which a polymeric material has been deposited or coated, and wherein the term "resilient polymeric coating" refers to a polymeric coating which is applied onto the surface of a hollow microsphere in order to enable at least a portion of the resulting microsphere to survive melt processing without becoming crushed in the composition. a) providing a plurality of inorganic hollow microspheres having an outer surface, b) coating at least a portion of the outer surface of the inorganic hollow microspheres with a polymerizable or polymeric coating, c) solidifying or curing the polymerizable or polymeric coating on the outer surface to form a resilient polymeric coating, whereby a plurality of sacrificial microspheres having a resilient polymeric coating are formed; wherein coating and solidifying or curing is selected from (i) treating the hollow microspheres with a solvent or waterborne solution of a polymeric material and removing the resulting solvent or drying; (ii) treating the hollow microspheres with a liquid monomer and a polymerization initiator and, after treatment with the liquid monomer, polymerizing the coating using actinic radiation or heat; and (iii) treating the hollow microspheres with monomer that is polymerized using a condensation polymerization; (i) treating the hollow microspheres with a solvent or waterborne solution of a polymeric material and removing the resulting solvent or drying; (ii) treating the hollow microspheres with a liquid monomer and a polymerization initiator and, after treatment with the liquid monomer, polymerizing the coating using actinic radiation or heat; and (iii) treating the hollow microspheres with monomer that is polymerized using a condensation polymerization; d) providing a plurality of the sacrificial microspheres having the resilient polymeric coating to a melt processing device, e) providing a polymeric material to the melt processing device; and f) melt processing the plurality of sacrificial microspheres having the resilient polymeric coating and the polymeric material with the melt processing device to produce a composition, wherein the polymeric coating includes filler selected from conductive carbon and nanotubes, wherein the term "melt processing" refers to applying thermal and mechanical energy to melt process a polymer or composition, such as techniques including compounding, extrusion, injection molding, blow molding, rotomolding, or batch mixing, wherein the term "sacrificial microsphere" refers to a hollow microsphere upon which a polymeric material has been deposited or coated, and wherein the term "resilient polymeric coating" refers to a polymeric coating which is applied onto the surface of a hollow microsphere in order to enable at least a portion of the resulting microsphere to survive melt processing without becoming crushed in the composition.