My PPG rep says that they are phasing out the Delstar to meet EPA regs. for the amount of solvent that is used in the spayable mixture. The Omni line does not have any UV screeners so it will fade quickly like the old enamels did.
My Jobber has a commercial line of PPG called "Essentials" that is a single stage paint with a catalyst. it goes on nice, looks like enamel but is better quality, and less costly than the automotive line.
