Creates the Paint Stewardship Act. Contains the findings of the General Assembly. Provides that manufacturers of architectural paint sold at retail in the State or representative organizations shall submit to the Director of the Environmental Protection Agency a plan for the establishment of a postconsumer paint stewardship program. Requires the program to meet specified requirements. Provides that manufacturers or retailers shall not sell or offer for sale architectural paint to any person in the State unless the manufacturer of a paint brand or representative organization is implementing an approved paint stewardship plan. Prohibits the incineration of leftover architectural paint collected pursuant to an approved paint stewardship plan. Provides that manufacturers or representative organizations shall submit reports with specified requirements. Provides that manufacturers or representative organizations participating in a postconsumer paint stewardship program shall not be liable for any claim of a violation of antitrust, restraint of trade, unfair trade practice, or other anticompetitive conduct arising from conduct undertaken in accordance with the program. Provides for administrative and oversight fees to be paid to the Agency. Provides that manufacturers or representative organizations shall implement the postconsumer paint collection plan within 6 months of the date that the program plan is approved. Contains provisions regarding postconsumer paint from households and small businesses. Contains other provisions.