I am going to be following you now...you have a much more advanced repair to do than I do! All the best on clearing: I am doing somewhat of a modified approach: I am going to clear over the existing paint with a different type of product, a alcohol-based lacquer (kind of like what it was originally coated with) prior to using my createx. Only after I finish everything, I will then bring it to the local auto shop and have them use 2PAC on it. I currently am working on my inserts. My numbers have sunk in a tiny bit after re-gluing, but I figured I can just add clear (I will be doing drip-in 2PAC to fill the inserts).
Please let me know how things go, perhaps we can help each other. My thread is:
https://pinside.com/pinball/forum/topic/la-portas-firepower-rejuvenation