From the looks of your picture the clearcoat is "crazing" which means it has cracks. If that is the case then the only solution is to remove everything, reprime with urethane and sand and repaint.
As far as doing it yourself, considering your track record on other repairs, I would just wax it and leave it alone. A complete strip and repaint is an expensive proposition.
I added a picture of the roof on my Sentra. It has a tan base coat, then a metallic and clear combination coat, then the final clear coat. I can't see painting this car, it's just not worth it.
To paint a car today, you need to not expose yourself to any fumes, or any direct contact with your skin. The overspray is very toxic and should be properly filtered, collected and disposed of. You need a very good spray booth and professional materials. I have painted 300 cars all over and many more partials in 10 years doing bodywork.
regards
mech
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