Evolution of (a) bulk C reservoirs and (b) porosities of OC and C V bodies with different grain sizes. The red lines are C V bodies with R_c = 60 km, while the green lines are OC bodies of the same size. Solid lines are bodies with grain sizes d = 1mm, while dashed lines are bodies with d = 1 μm. The lines highlighted with gray shadows are our fiducial runs.