Overview

Two-step fleet washing is the industry-standard method for cleaning trucks, trailers, and heavy equipme nt. Using a Step #1 acid-based cleaner followed by a Step #2 degreaser or general-purpose soap, operators can remove oxidation, grime, road film, diesel soot, and grease more efficiently than with a single wash.

This guide covers chemical selection, equipment setup, application, and safety practices for both manual and automated systems, including remote control operation and low-pressure downstream injection.

Step 1 – Chemical Selection

Step #1: Acid-Based Cleaner

Purpose: Loosens oxidation, road film, and mineral buildup on unpolished aluminum or other hard surfaces.

Recommended Products:

  • Glacier – Aluminum brightener for unpolished surfaces
  • Hurricane – Maximum-strength acid cleaner for heavy grime

Key Points:

  • Only use on non-polished aluminum unless specified.
  • Follow dilution instructions closely to avoid surface damage.
  • Test on a small area if unsure of the surface type.

Step #2: Choosing the Right Soap / Degreaser

Purpose: Removes oils, grease, bug residue, and remaining dirt after the acid step.

How to Choose:

  1. Surface TypePolished aluminum / chrome / show trucks: Use polish-safe soaps like Magic or Dome.Non-polished aluminum or industrial vehicles: Use heavy-duty degreasers like Beartooth or Yellowstone.
  2. Cleaning NeedsHeavy grease & road grime: Strong degreasing soaps like Beartooth.General dirt, bug residue, or frequent washes: Gentle but effective soaps like Magic or Yellowstone.
  3. Application MethodFoam cannon / high-foaming applications: Polish-safe soaps work well for aesthetic-focused vehicles.Pump sprayer / spot cleaning: Heavy-duty degreasers excel at localized, tough grime removal.

Key Points:

  • Always match the soap to the surface and dirt type.
  • Follow dilution instructions for optimal cleaning and surface protection.
  • Step #2 is critical for rinsing away residual acid and grime.

Step 2 – Equipment Setup

1. Two-Step Pressure Washer Gun

  • Switches between Step #1 and Step #2 chemicals without walking back to the tanks.
  • Ensures smooth transitions and consistent chemical application.

2. Low-Pressure Downstream Injector Kit

  • Quick-connect system for applying Step #1 and Step #2 soaps using low pressure.
  • Includes injector, soap tips, chemical selector, quick-connects, soap lines, and chemical drop sticks.
  • Pre-configured for your washer’s GPM and PSI.

3. Remote Wireless Control System

  • Toggle between acid and soap from anywhere on site.
  • Reduces physical strain and increases workflow efficiency.
  • Compatible with downstream injectors or pre-wired two-step setups.

Step 3 – Washing Process

  1. Prepare the VehicleRinse loose dirt and debris.Inspect surfaces for sensitive areas.
  2. Apply Step #1 CleanerUse acid-based cleaner for unpolished surfaces.Apply evenly using a two-step gun, downstream injector, or remote system.Allow dwell time (1–3 minutes).Do not let the chemical dry.
  3. Rinse Step #1Rinse with clean water or Step #2 soap immediately.Remove all acid residues.
  4. Select & Apply Step #2 SoapChoose the soap based on surface type and soil level (see Step 1 guidance).Apply with two-step gun, downstream injector, foam cannon, or pump sprayer.Agitate lightly if needed for tough grime.
  5. Final RinseRinse thoroughly with high-pressure water.Inspect surfaces for missed spots or residue.
  6. Optional Protectant / Spray WaxApply to polished surfaces for shine and water sheeting.

Step 4 – Safety & Best Practices

Personal Protective Equipment (PPE)

  • Chemical-resistant gloves, boots, and clothing
  • Eye protection or full-face shield

Chemical Safety

  • Always read the MSDS for all products used.
  • Store chemicals in labeled, secure containers.
  • Use correct dilution ratios to avoid surface damage or injury.
  • Never mix incompatible chemicals.

Operational Safety

  • Avoid letting Step #1 acids dry.
  • Keep hoses and workspace clear of obstacles.
  • Inspect hoses, tips, and injectors for wear before use.
  • Protect sensitive electronics and polished surfaces.

Ergonomics & Efficiency

  • Use remote controls or downstream injectors to reduce repetitive walking.
  • Maintain a steady workflow for consistent coverage.

Step 5 – Maintenance & Cleanup

  • Rinse hoses, wands, and injectors after use.
  • Flush downstream injectors to prevent clogging.
  • Store chemicals according to manufacturer instructions.
  • Inspect equipment for wear and replace worn parts promptly.

Equipment Checklist

  • Pressure washer (appropriate GPM & PSI)
  • Two-step injection gun or downstream injector kit
  • Remote wireless chemical selector (optional)
  • Step #1 acid cleaner (Glacier, Hurricane)
  • Step #2 soap / degreaser (Beartooth, Yellowstone, Magic)
  • Spray wax / rinse agent (optional)
  • PPE: gloves, eye protection, boots, chemical-resistant clothing

Safety & MSDS

Always consult the MSDS for each chemical used. Follow all handling, PPE, and storage recommendations to ensure safe, effective operation and protection of personnel and equipment.