[DMA]

I had the same thing happen to my 2009 E92 M3. This thread helped guide me on what to do. THANKS TO THE OP

Unfortunately it sits outside for most of its life. I had it under bmw car cover, xpel clear bra on roof, and ceramic coating on xpel. Still with all that the gel coat failed. The good news is I was able to save it. I think my saving grace was the xpel. The clear started to bubble under the xpel. When I started to peal off the xpel the gel coat came off with it.

I got lucky and literally all of the gel coat came off with the xpel. Just came out like in sheets.

I then had a body shop just spray clear over it with the OPs instructions.

Here is pics of the whole process:

When I first started pealing it:









This is after all of it pealed off. It was extremely easy it just came off in sheets.






At body shop before they started to work on it. Lines on roof are just from the blue tape I put on it for trip there.





During the process of clear coating. The close up pic is before any last wet sanding.







Final Results