The role of micrometeorite bombardment in space weathering on asteroid surfaces was studied using a 2 MV Van de Graaff accelerator. About 90,000‐ to 100,000‐micron‐ to submicron‐sized copper particles with a mass and velocity distribution similar to the interplanetary dust population were fired onto the surfaces of polished Allende CV3 chondrite and eucrite NWA 6966 samples at speeds between 1 to 70 kilometers per second. We find a clear relationship between microparticle bombardment, infrared reflectance decrease, and overall spectral reddening. Differences in impact effects due to variable particle speed, size, and structure are observed. Some Cu particles form large clusters that break up upon impact and disperse. Other impactors leave imprints on the surface, and implant or generate typical craters with rims and spallation features. Very small, fast particles generate small craters without spallation or significant crater rim. Mid‐infrared (IR) spectra (bulk and microscopic measurements of individual components), 3‐D laser microscopic images and XRD spectra from the processed and unprocessed samples were collected. Mid‐IR spectra (700–6,000 cm−1) over the entire sample surface show overall darkening of features. Microscopic IR spectra show the damage seen as reflectance decrease and spectral reddening, which is variable in the micrometer range, depending on impact density and target properties (mineralogic composition). The fine‐grained Allende matrix with predominantly Fe‐rich olivine seems less affected than coarse‐grained chondrules with Mg‐rich silicates, where darkening can reach 60%. X‐ray diffraction analysis also suggests chemical and crystallographical differences in the bombarded sample, due to impact shock. Plain Language Summary Weathering processes in space affect the surfaces of, for example, asteroids, due to the constant bombardment with electrons, ions, and photons emanating from the sun, and the ubiquitously present cosmic dust. This bombardment leads to changes in the physical and chemical properties of affected surface materials. The research presented in this paper focuses on the alteration of meteorite samples via dust bombardment. We shot nanometer‐ to micrometer‐sized copper particles with velocities of up to 70 km/s onto meteorite samples that resemble asteroid surfaces, using a dust accelerator. The samples were analyzed with mid‐infrared reflectance spectroscopy and spectra of processed and unprocessed samples were compared. Hypervelocity impacts result in a variety of impact shock phenomena, depending on the mass and velocity of an impactor. Dents, implanted particles, craters, cracks, and ejected surface material can be observed. Impact shock effects are also observed to spread over a wide area surrounding the impact site, indicating structural and chemical changes in the material, for example, the formation of glasses. The damage and accompanying optical changes due to impact are visible in mid‐infrared reflectance spectra, mainly as a reduction of reflectance, the flattening of band peaks, and the shifting of bands toward longer wavelengths. Key Points We simulated particle impacts onto meteorite targets with a dust accelerator Mid‐infrared spectroscopy was performed on impacted Allende meteorite and NWA 6966 eucrite This study aimed at investigating the role of micrometeoroid impacts in space weathering