Rust Treatment / Underbody / Cavity Wax SWMS
Rust removal and treatment, masking and vehicle protection, and application of underbody deadener and cavity wax to vehicle underbodies and enclosed sections, including work beneath raised vehicles.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Underbody and cavity treatment combines two serious hazards that rarely appear together: aerosolised product accumulating in enclosed vehicle sections and beneath the vehicle where ventilation is poorest, and the worker positioned under a raised vehicle for extended periods. This Safe Work Method Statement covers rust removal and converter treatment, masking and vehicle protection, and underbody and cavity application — specifying positioned local extraction and air-fed respiratory protection for extended cavity work, and treating vehicle support as a crush-fatality control where a hoist or rated stands are mandatory and a jack alone is never acceptable.
Hazards identified
9 hazards covered, sorted by priority.
Respiratory irritation; lead exposure on older vehicles; acid burns
Eye and skin penetration injury
Water contamination
Musculoskeletal strain
Crush fatality
Fire risk on hot components; ground contamination
Inhalation exposure; solvent overexposure
Fire
Ground and water contamination
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1On-tool extraction while abrading
- 2P2 respirator and face shield
- 3nitrile gloves and eye protection for converter
- 4test for lead on pre-1970s vehicles before abrading
- 5Full face shield with wire wheels
- 6guards fitted
- 7secure the component or vehicle before abrading
- 8Collect debris on drop sheets
- 9neutralise and contain acidic residues
- 10no discharge to stormwater
- 11Use a creeper or raise the vehicle to a working height
- 12rotate tasks to limit sustained overhead work
- 13Hoist arms engaged and locked or rated stands used — never a jack alone
- 14check load rating and vehicle balance before working underneath
- 15Mask brakes, exhaust and driveline
- 16lay drip trays and floor protection beneath the work area
- 17Positioned local extraction at the work area
- 18air-fed respirator for extended cavity work
- 19limit continuous application time
- 20ventilate the bay
- 21Confirm the exhaust and driveline are cool and masked before spraying
- 22eliminate ignition sources
- 23Drip trays and bunding beneath the vehicle
- 24capture and dispose of residues as dangerous-goods waste
Applicable Codes of Practice
Primary approved code for this work — booth and mixing-room design, ventilation, RPE selection, isocyanate handling and health-monitoring triggers.
Hazardous chemicals register, SDS, labelling, storage segregation and the risk-management process for paints, hardeners and solvents.
Definitive national guidance on isocyanate sensitisation, air-supplied RPE, exposure standards and respiratory health surveillance.
Applies to compressor, spray gun, air-tool and panel-work noise where the 85 dB(A) LAeq,8h exposure standard may be exceeded.
Ventilation, lighting, eyewash and emergency shower provision, and amenities for workers handling hazardous chemicals.
The hierarchy of control this SWMS is structured around — elimination and substitution before engineering, administration and PPE.
Design, airflow, classification and maintenance requirements for the booth and mixing room this SWMS relies on as its primary engineering control.
Fit-testing, facial-seal and maintenance requirements — the basis for the air-supplied respirator program.
Performance standard the air-fed hood and A2P2 respirators must be certified to.
Dangerous-goods store design, quantities, bunding and separation for paints, thinners and solvents.
Who this is for
- →Rustproofing and underbody protection technicians
- →Panel shops and mechanical workshops
- →Fleet and 4WD preparation services
- →WHS managers in automotive workshops
What you receive
- ✓Fully editable Microsoft Word (DOCX) SWMS — populate company, ABN, site and worker fields directly
- ✓Task-by-task risk assessment across occupational health, safety and environment, with severity × likelihood scoring before and after controls
- ✓Controls written to the hierarchy of control — elimination and substitution first, PPE last
- ✓High risk construction work classification with the specific s. 291 category and why it is triggered
- ✓Isocyanate health-monitoring and air-monitoring requirements stated as legal duties, not optional extras
- ✓PPE schedule referencing AS/NZS 1715 and 1716, including air-supplied respirator requirements
- ✓Training and competency register covering fit-testing, SDS interpretation and isocyanate awareness
- ✓Emergency procedures for chemical splash, inhalation, sensitisation episode, solvent fire and spill
- ✓Worker sign-on register and review/sign-off block ready for immediate site use
Worked example
A technician spent most of a shift applying cavity wax through sill access holes with only a dust mask, working under a hoist in a bay with no local extraction. He reported headache and nausea by mid-afternoon — a classic solvent overexposure. Adding positioned extraction at the work area, upgrading respiratory protection and limiting continuous application time brought the task under control.
Related legislation
- Work Health and Safety Act 2011 (NSW) — primary duty of care, s.19
- Work Health and Safety Regulation 2025 (NSW) — Chapter 3 Risk Management
- Work Health and Safety Regulation 2025 (NSW) — Part 7.1 Hazardous Chemicals (register, SDS, labelling, storage)
- Work Health and Safety Regulation 2025 (NSW) — Part 7.1 health monitoring provisions; Schedule 14 lists isocyanates
- Work Health and Safety Regulation 2025 (NSW) — s. 291 High Risk Construction Work and the SWMS duty
- Protection of the Environment Operations Act 1997 (NSW) — air emission and waste disposal duties
Frequently asked questions
Why does cavity work need better protection than general spraying?
Because the mist has nowhere to go. Spraying into a sill or box section fills an enclosed volume that vents back toward the operator, and the worker is often underneath the vehicle where vapour accumulates. General workshop ventilation does not reach either location, so positioned local extraction and higher-grade RPE are required.
Is this SWMS specific to NSW?
Yes. It cites the Work Health and Safety Act 2011 (NSW), the Work Health and Safety Regulation 2025 (NSW) and SafeWork NSW guidance. The same document is available for every other state and territory — the legislative references are swapped for that jurisdiction.
Do I legally need a SWMS for spray painting in a workshop?
A SWMS is legally mandatory under s. 291 only for high risk construction work. Fixed-workshop spraying is generally not construction work — but you still have a duty under the WHS Regulation to document how you control a hazardous-chemical risk of this severity, and the Spray Painting and Powder Coating Code of Practice is the benchmark you will be measured against. The moment you spray on a construction site, or in a contaminated or flammable atmosphere, the SWMS becomes mandatory.
Is isocyanate health monitoring really compulsory?
Yes, where there is ongoing use of isocyanates and a significant risk of exposure. Isocyanates are listed in Schedule 14 of the WHS Regulation, which triggers the health-monitoring duty — baseline and periodic respiratory function testing and medical assessment by a registered medical practitioner. It is one of the most commonly missed obligations in Australian panel shops.
Will a cartridge respirator do instead of an air-fed hood?
Not for continuous two-pack spraying. Negative-pressure cartridge respirators are not accepted as adequate protection against isocyanate spray mist — the accepted control is an air-supplied (air-fed) respirator. Air monitoring is how you demonstrate that the RPE you have selected is actually adequate for your process.
How do I know if my booth ventilation is good enough?
Airflow should be verified against the booth specification before each shift, the LEV inspected and tested on a documented schedule under AS/NZS 4114, and the whole control set validated with personal air monitoring. A booth that passed its annual service can still fall below specification as filters load between changes.
Can I edit the document?
Yes — it is a fully editable DOCX written as a site-specific template. You complete the company, ABN, site, plant and worker sign-on fields, and adjust the tasks to match your actual process before use.
Who wrote it?
It is authored by an occupational hygiene team led by a Certified Occupational Hygienist (CIH), which is why the exposure, ventilation and monitoring content goes considerably further than a generic template.