Methods and compositions for cleaning polymerized residue

A method of cleaning residue from surfaces of paint production equipment, the method comprising:

• diluting a concentrate composition with water to produce a cleaning composition, the concentrate composition comprising:
• a) at least 30 wt-% organic solvent selected from the group consisting of aromatic alcohol, glycol ether, and mixtures thereof;
• b) at least 8 wt-% alkanolamine;
• c) alkalinity source;
• d) surfactant;
• e) no more than 50 wt-% water, wherein the cleaning composition has a pH of 10 or higher at the time of dilution;
• heating the cleaning composition to a temperature of at least 55° C.;
• and
• applying the cleaning composition to the surfaces of the paint production equipment.