Presented article is aimed to powder coating and monitoring surface quality. Powder coating is considered as one layer surface treatment to protect against environment. Thickness of layer is several micrometers (depend on powder type) and meets high requirements and demand on surface protection against scratches, abrasion and other material specifications. Presented article is focused on experimental study of surface roughness influence on surface quality after polymer powder coating (surface roughness and coat thickness). Last part of article is aimed to statistical verify individual parameters by chi test.