Method and system for determining a quality parameter of a representation of a coating composition

A process for determining a quality parameter of a representation of a coating composition, said method comprising the steps of:

• (i) providing a modified or new representation of a coating composition;
• (ii) preparing the coating composition from the provided modified or new representation;
• (iii) producing a coating layer on at least a part of a substrate by manually applying the coating composition prepared in step (ii) with a spray gun comprising a sensor unit, a processing unit and optionally a signal unit to at least part of the substrate while acquiring sensor data with the sensor unit;
• (iv) optionally providing feedback to a user via the signal unit during manual application of the coating composition based on the sensor data acquired in step (iii);
• (v) optionally repeating steps (i) to (iii) or steps (i) to (iv);
• (vi) providing to a computer processor via a communication interface at least a part of the sensor data acquired in step (iii);
• (vii) providing to the computer processor via the communication interface surface property data of at least one coating layer produced in step (iii) by determining the surface property data of at least one coating layer applied in step (iii) and providing the determined surface property data to the computer processor via the communication interface;
• (viii) determining with the computer processor at least one quality parameter of at least one representation provided in step (i) based on
• the sensor data provided in step (vi), and
• the surface property data provided in step (vii);
• (ix) providing via the communication interface the at least one quality parameter determined in step (viii);
• and
• (x) providing the representation of the coating composition via the communication interface to at least one database if the quality of said representation is determined in step (viii) to be acceptable.