Let me see if I can help clarify things a bit. There are two things that could have happened with the epoxy when it was mixed. Either not enough reducer was used, or the wrong reducer was used. Certain solvents like xylene don't melt into the epoxy very well (you'll know when stirring it. If...
I'm in the same boat. I need to paint my trunk and door jams as well. It's well proven that prep work is the most important step. Make sure to remove any dirt and dust first by using a bristle brush and compressed air. Now that its dirt free, you'll need to use a wax and grease remover to...