Probably the FIRST thing to let go would be the hose fittings, if you fed in an unregulated 90-120 PSI from a large compressor. Now if you use the scuba tank method of supplying air and forget a pressure regulator, it might get dangerous as the hose whips around when you feed in 4000+ PSI. A typical small airbrush compressor probably won't generate enough pressure to actually hurt anything, other than causing very poor paint application, if you turn it up too high.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
What kind of any problems are you having? I have nerve hurt a paint gun (real one for painting 1:1 cars) from air pressure. Main thing that kills guns is not cleaning right when you are done.
Cuda Ken
I hate Rust
You may blow out the little 'O' rings in a Badger air brush, but I would think the hose might burst first! 20-35 lbs of air pressure is more than enough!
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin
Can to much airpressure when airbrushing cause damage to the brush eg. tip or other parts? thanks rambo1......