Aviation Drywash: Why Arizona Airports Require It

The first time a line tech waves you off for trying to wash a plane on the ramp, it can feel like red tape. It isn't. It's the storm drain twenty feet away, and it's the person who answers for what touches the tarmac. Out here in Arizona, the answer at almost every field is the same: drywash — and it isn't a suggestion.

So what is drywash, really?

It's cleaning an aircraft without a hose. We lift the desert off the airframe — the fine ramp dust, exhaust soot, brake dust, the film that bakes on in the sun — using aviation-approved compounds and a stack of clean microfiber, then buff it down to a slick, protected finish. No buckets, no puddle under the aircraft, no hose snaking across a live ramp. Done right, you'd never guess water was never involved.

Why the field insists on it

Here's the part most owners never see: the airport is on the hook for whatever goes down its drains. A regular wash pushes soapy, dirty water across the ramp and into a storm system that often runs straight to the watershed — and that becomes the airport's compliance problem, not yours. Which is exactly why they won't let it happen on their property. Zero runoff isn't us being precious about process. It's the price of admission to work on the ramp at all.

• Nothing hits the ground — no runoff, no drain contamination, no write-up
• No wash bay needed — we come to the hangar or the ramp and work in place
• FOD-aware start to finish — a walk before we start and another after we pack up
• In and out faster — no water to haul, set up, or break down

And honestly, it's better for the aircraft

An airframe isn't a car door. The compounds we reach for are pH-controlled and chosen for what they're actually touching — safe around avionics seals, anodized aluminum, polished brightwork, and composite panels, with no chlorinated solvents and nothing with silicone anywhere near a seal. Do it correctly and you leave a thin protective layer behind that makes the next clean go quicker. Do it carelessly with a pressure washer and a gas-station mitt, and you're grinding grit into the paint. We've seen both come through the hangar. We only do one.

The bottom line

Drywash isn't a shortcut — it's the standard that keeps you square with the airport and keeps your aircraft protected between flights. Easy gut check: if a detailer can't walk you through their drywash process and their FOD protocol in plain English, keep them off your ramp.