The elastic and inelastic scattering polarization observables of the 800 MeV protons on 12C and 16O nuclei are calculated on the basis of the multiple diffraction scattering theory. It was shown that the results of the calculations for elastic p-12C and p-16O scattering by the α-cluster model with dispersion are in a better agreement with the experimental data than those with the single-particle nucleon density.