Trockeneisstrahlen am Unterboden eines VW Käfer in der Knepper-Werkstatt in Rahden
Dry Ice Blasting & Dry Ice Cleaning in Rahden

See what's hiding under
the underbody coating.

We strip body, engine and underbody right down to the bare metal. No sand, no water, no chemicals – on the fully assembled vehicle. Afterwards you know exactly where you stand, and we can carry straight on with the work.

30+
Years of Beetle experience
4.8
★★★★★ ★★★★★
Google rating
100,000 €
Professional blasting rig
50 km
Service area around Rahden
The process

What is dry ice blasting?

Frozen CO₂ pellets hit the surface with compressed air. The thermal shock makes dirt, grease and old underbody coating brittle, and the impact blasts the layer off. The ice itself turns straight into gas – all that remains is the loosened dirt, which is simply swept up.

No blasting media, no moisture
Nothing is left behind that could creep into seams, bearings or cavities. No sand, no water, no chemicals.
Gentle on the substance
Dry ice works without any abrasive effect. Sheet metal, intact paint, rubber, wiring and aluminium remain untouched.
On the assembled vehicle
Blasting is done without disassembly, even in the engine bay with all electrics in place. That saves weeks of teardown.

How it differs from other methods

Sand blasting
Removes material and can warp thin body panels. Sand settles into every crevice and keeps trickling out for years. It does remove solid rust, though – something dry ice cannot do. On an assembled vehicle, sand is off limits.
Chemical cleaning
Attacks rubber, seals and aluminium, creeps into seams and keeps working there. Disposal is complex. Dry ice needs no chemicals at all.
High pressure and steam
Water gets into connectors, cavities and bearings and causes invisible damage there. Dry ice stays dry at all times.
Ultrasonic bath
Great for removed small parts such as carburettors, but only as an immersion bath. For underbody, bodywork and engine bay on the whole vehicle, dry ice is the only option.
Honestly: what dry ice cannot do

Dry ice cleans and exposes – it does not remove solid rust. That is exactly the point: after blasting you see your vehicle's true condition. Very tough, still elastic underbody coating takes more time; we tell you beforehand. And bare metal should be preserved promptly. We take care of both in-house on request.

Real work

Results from our workshop

Bodies, engines and complete vehicles from real customer jobs in Rahden.

Beetle body, underbody coating removed
Beetle body, underbody coating removed
Engine, cleaned in place
Engine, cleaned in place
Engine after dry ice cleaning
Engine after dry ice cleaning
Floor pan, stripped to bare metal
Floor pan, stripped to bare metal
Vehicle cleaning for a customer
Vehicle cleaning for a customer
Underbody after blasting
Underbody after blasting
Body, ready for rebuild
Body, ready for rebuild
See dry ice in action
Watch video: Dry ice blasting at Knepper (4K)
Watch video: Dry ice blasting at Knepper (4K)
Watch video: T1 Samba dry ice cleaning
Watch video: T1 Samba dry ice cleaning
Watch video: Split-window Beetle dry ice blasting
Watch video: Split-window Beetle dry ice blasting
The player only loads from YouTube after you click (privacy-enhanced mode). Videos are in German.
Who it's for

Three use cases, one process

Our speciality

Classics & Beetles

Before restoration, before buying or before preservation: we take decades of bitumen and dirt off and then tell you honestly how your metal is doing. We have been restoring Beetles for over 30 years – we know where the thin metal sits.

  • Underbody and floor pan
  • Engine bay and engine
  • Bodywork before welding
  • Assessment with recommendation included
Complete car from €540
Send an enquiry

Motorcycle

Engine, frame and attachments come clean without removal – and without water in the electrics and bearings. Ideal at the start of the season, before selling, or as the basis for a winter rebuild.

  • Cleaning with everything in place
  • Fixed price based on photos
  • Gentle on paint, chrome and rubber
Complete from €180
Send photos by email

Engines & Gearboxes

We free removed engines and gearboxes from oil, grease and dirt – without water or chemicals. Ideal before an overhaul, resealing or sale.

  • Cleaning of the removed unit
  • No blasting media residue in galleries and bearings
  • Further work in-house on request
from €100
Send an enquiry
Pricing

Clear prices instead of a blank cheque

Billing is time-based: €180 per hour incl. VAT. These starting prices apply to typical jobs. After a short inspection or based on your photos, you receive a binding quote.

Motorcycle, complete
Engine, frame and attachments
from €180
Car engine bay
Cleaned in place
from €180
Car, complete
Scope depends on vehicle and condition
from €540
Engines & Gearboxes
Removed units
from €100
Work billed by time
e.g. classic car projects and partial areas
€180 per hour

All prices incl. VAT. The final price depends on condition and scope and is agreed bindingly before the appointment. Pickup within the local area available on request.

How it works

Four steps to a clean vehicle

1
Send an enquiry
Fill in the form below or give us a call. A few phone photos of the vehicle by e-mail help us with a guide price.
2
Inspection & fixed price
For larger jobs we inspect the vehicle in Rahden and quote a binding price.
3
Blasting appointment
Most jobs are done in a single day. Documented with before-and-after photos on request.
4
Assessment & next steps
You get an honest picture of the substance. On request we preserve, weld or restore right away.
Send an enquiry

Tell us briefly what you need, and we get back to you with a guide price.

A few details are enough. We call you back or reply by e-mail, usually on the same working day.

We use your details only to handle your enquiry. Details in our privacy policy

Frequently asked questions

What customers want to know before their appointment

What does dry ice blasting cost?
Billing is €180 per hour including VAT. Typical jobs have starting prices: motorcycle from €180, engine bay from €180, complete car from €540, removed engines and gearboxes from €100. After photos or an inspection we quote you a binding price.
Does blasting damage paint, rubber or electrics?
No. Dry ice works without any abrasive effect. Intact paint, seals, wiring and aluminium remain untouched. With very old filler or loose old paint we discuss the approach beforehand and blast a test spot first if needed.
Does dry ice remove rust as well?
No – dry ice cleans and exposes. Rust becomes visible but is not removed. That is exactly the value: you see your vehicle's true condition. Rust removal, welding and preservation can then be done in-house on request.
Does old bitumen underbody coating really come off?
Yes – old, brittle coating pops off well under the thermal shock. Fresh, still elastic coating takes considerably longer. After a look at the vehicle, we tell you honestly what to expect.
Do I need to disassemble or prepare my vehicle?
No. Blasting is done on the assembled vehicle, even in the engine bay with all electrics. You bring the vehicle to us in Rahden; non-running projects come by trailer by arrangement. Within the local area we can also pick your vehicle up on request.
How long does an appointment take?
That depends on the vehicle, its condition and the scope – most jobs are completed in one day. We tell you the time frame together with the quote.
What happens to the bare metal after blasting?
Exposed metal should be preserved promptly. On request we apply cavity sealing and underbody protection straight afterwards, so your vehicle is finished in a single pass.
For us, blasting is the first step, not the end.
Knepper Bugs & More

For us, blasting is the first step, not the end.

We have been restoring air-cooled Volkswagens in Rahden for over 30 years. If blasting reveals work to be done, our workshop, welding equipment and more than 1,300 parts in stock are ready.

View restorations