In recent years it has been found that the method of proton backscattering in the low-MeV energy region can provide advantages that are not attainable by backscattering of other projectiles. Among these are better sensitivity for profiling light elements and larger accessible depth of the sample. For the analysis of multielemental samples, however, a consistent set of experimental scattering cross sections and computer methods in data analysis are needed. In the present study a database of experimental non-Rutherford cross sections for 170° proton backscattering analysis is supplemented with new data for Ti and Al. Examples of recent applications of proton backscattering are presented, literature cross sections and the interference from inelastic and nuclear transformation reactions are investigated and computer methods for data treatment are examined.