Thanks for sharing your experience! I'm a newbie as well and reading your post a few months back both inspired and terrified me! And I'm happy to say that my experience has been similar in slightly different ways. I'm at the point now where my first three BEAUTIFULLY airbrushed layers now have to be completely redone due to a reaction with my clear, which resulted in damage to another color while I tried to fix it, and ultimately just facing the reality that I just need to start over.
These restorations are excruciating! But thanks for sharing your story, helps me to realize that this is the way it goes!