I reallly need to remember to turn the pressure back down from 40 PSI after I get done cleaning the airbrush and start spraying again.
It makes for a nice powdery paint job. Luckily it was on the bottom of my M41.
I havent had any trouble cleaning my AB (Badger 100G) at the same psi I spray with. I use acrylics almost always and clean it up with windex. On the rare occasion I spray enamel, lacquer thinner does the trick. In either case cleaning at 40 psi would just cause me to have to use more windex/thinner as the cup would empty faster, cleaning less. Having the solvents sit in the cup a bit longer seems to break down the paint better. What are you using to for paint and to clean with?
haha been there done that… got the overspray to prove it! [;)] If it’s any consolation I still forget now and again, but I always do a test shot on paper before I spray on a kit, to make sure no windex or water is in the needle chamber so it hasn’t bit me yet!
Post yourself a reminder on the back of your paint booth:
CHECK PRESSURE BEFORE SPRAYING
Could even make the sign itself a fun military stenciling project. 
Even better: Make it a REMOVE BEFORE FLIGHT style of reminder, something that covers your airbrush or your booth.
Most of my painting is done with Vallejo Model Color, but this time it was Tamiya Olive Drab. My first time using Tamiyas. I clean with Windex, followed by Badger airbrush cleaner, then isopropyl.