Abstract: The present disclosure describes polishing compositions, wherein the polishing compositions include cerium oxide, one or more suspending agents, and water, and optionally one or more preservatives; methods of preparing a polishing composition; and methods of polishing a surface, wherein the methods include applying the polishing compositions to a surface to remove contaminants and scratches. The present disclosure also describes sealant compositions, wherein the sealant compositions include two or more dimethyl siloxanes, and one or more hydrocarbons; methods of preparing a sealant composition; and methods of sealing a surface, wherein the method includes applying the sealant composition to a surface. The present disclosure also describes methods of polishing and sealing a surface, wherein the method includes cleaning and polishing a surface with a polishing composition of the present disclosure and sealing the cleaned and polished surface with a sealant composition of the present disclosure.

Abstract: A docking station includes a housing operable to receive and releasably secure a handheld printer, and a freeing mechanism, where the freeing mechanism is operable to release the handheld printer from the housing. The docking station also includes a print head cap operable to receive a print head of the handheld printer when the handheld printer is secured in the housing, and a print head wiper, where the print head wiper is operable to wipe the print head of the handheld printer during the release of the handheld printer from the housing.