I use Dupli-color a lot, I've found it doesn't like humidity, perfect match and the clear. I try not to use it unless the humidity is below 50% around 40% is Ideal. I paint in my basement with an indoor spray booth vented and I have a humidity gauge down there so I know when it's good for painting. You can also use a small heater to blow hot air on it to get the blush out of it when spraying, just be careful about how hot. Blushing can be polished out in most cases but I prefer to try to stop from having it.