I hope you have better luck with your e-coating then me.
My doors are swelling out at the seam on the bottom because all the stripper was not neutralized correctly.
I was told that it was from electrolisis forming in there from the stripper growing in the seams.
These were a set of rust free doors that I had done.
I also had some spots on my fenders that was not covered with the e-coat because there was air bubbles trapped in the top corners. The fenders are doing fine after the process though and I just sprayed some undercoating in the bare spots.

David