I was painting a bumper and i was using Omni base coat .I mixed one part paint one part medium reducer. It requires no activator/Hardener. I read on one of the threads that I can use 1 tablespoon of the clear Hardener to make it more durable . I wonder if that was the culprit?also i prepped it with windex. Any help will be appreciated?

it looks like a slight blushing problem caused from hi humidity and or a fast reducer. it should go away when you clear it. a simple test you can do is to put some water on a small spot and if it goes away then the clear will do it to. it won't make it go way physically, but some how it disappears magically.
Jay D.

Thanks Jay I just gave it another coat today then clear it. It came out good.

GREAT
Jay D.