Just do like my old boss did in the body shop I worked at...glue sprinkler nozzles to the ceiling of the booth. Anybody walks in, they see the nozzles and it's all good. And for the record, in 37 years in the industry, I have never seen a fire in a paint booth.
That reminds me of a trick I have seen in my industry.
Last few years there have been a number outdoor large tent calamities. They are often held in place by multiple long steel stakes. As more accidents occur because of stake pull out under severe weather, the mandated solution is often just more stakes. The problem is in hard/unknown ground, driving and removing the stakes can be very difficult.
The trick I spotted one vendor resorting to to pass inspection, the stakes instead of being 3' long, were only 6", and once driven, nobody was the wiser.
Inspectors are not always real inquisitive, but once tricked, are nearly impossible.