Sorry, I don't have a clue but I just wanted to say this is nothing new. I once painted a cowl a nice LK blue and it didn't take long to go so dark it looked black. LK has always had a quality control problem. Even today you will find a lot of problems. Last can/s of Cub Yellow came out of the can orange?? Not an orange tint but orange?? Try to find a match in a different brand.