The problem this solves
Undercarriages collect road salt, hardened oil and grease, undercoating overspray, and chassis grime that pressure washing can't fully reach without soaking the brake, fuel, and electrical systems that share the same real estate.
On a restoration project, the bigger problem is preservation. Once you've media-blasted a decal off, you can't replace it without making the car worth less. Restoration buyers need a method that removes soil aggressively but leaves original markings, paint shadows, and factory finishes alone.
Why dry ice blasting fits
Dry ice pellets are low-abrasion — they sublimate on impact, so they remove soil from the surface without etching, peening, or stripping the substrate. On a chassis, that means we can take 40 years of road grime off a frame rail and leave the factory stamping legible underneath.
There's no secondary moisture, which matters for brake hardware, wheel bearings, electrical connectors, and the unfinished steel inside frame cavities. The chassis is dry when we hand it back.
Surfaces and equipment we clean
- Frame rails, cross-members, and chassis stampings
- Suspension components — control arms, springs, shock mounts
- Wheel wells and inner fenders
- Engine bay (separate scope available)
- Brake assemblies and rear axle housings
- Original-paint underbody panels (preservation-grade)
Where this isn't the right method
- Paint correction, polish, or detail work — that's a separate scope.
- Rust removal on heavily corroded steel — dry ice removes surface oxide and loose scale; deep pitting still needs mechanical or chemical treatment.
How the engagement runs
- 01Photo or shop walk-through
Send underbody photos. We'll flag preservation-sensitive surfaces and quote.
- 02Lift access + masking
Job runs in your shop on your lift, or in our partner facility for traveling restorations.
- 03Blast pass + documentation
Per-zone before/after photos for the build sheet or the show binder.
- 04Handoff
Chassis is dry and ready for paint prep, inspection, or reassembly.
What drives the quote
- Vehicle size (sedan vs. ¾-ton truck)
- Buildup density and age
- Whether the engine bay is in scope
- Preservation requirements (concours-grade vs. driver-grade)
- Distance from Kalispell dispatch
What we bring, what we coordinate
- Fuel-system isolation confirmed before any work near tanks or lines.
- CO₂ monitoring in enclosed shop bays.
- Containment to keep soil out of adjacent vehicles and shop air.
Vehicle Undercarriage Cleaning — questions buyers ask us
No, when scoped correctly. We test on a hidden area and dial the pressure for preservation work. Concours-grade jobs use the lowest viable setting.
Yes — that's a related scope. See engine bay cleaning. We typically quote chassis + engine bay together for restoration projects.
Yes, if that's the scope. Undercoating removal is heavier work than salt-and-grime removal — we'll quote it as a separate line.
Preferred. We can travel with a portable lift for some scopes, but it's faster and cleaner in your shop.