Hi,
I got my teardrop professionally sprayed and have had no problems with any signs of cracking or fatigue of the lacquer after 2 years use. I love in the UK so don’t experience very high temperatures but I expect modern lacquers are quite able to cope with this.
My main advice would be to ensure that the lacquer has a high UV protection factor. Apparently it varies and I had to ask around and check out the technical specs to be sure.
I was well worth it and resulted in a great finish that needs no ongoing maintenance.
Hope that helps
Andrew