This work presents a problem of evaluation of the quality of varnish layers in cars as a result of examination of layer distribution thickness. This report contains some characteristics of layer properties, mainly focused on new brand and after renovation of varnish coatings. The quality criterion in applying coating process is also presented. The examination of distribution thickness of varnish layers was done at new and repaired cars. The statistical methods were used for determination of reliability of achieved results. Effects of this work were submitted to a substantive analysis and presented at charts.