Pressure washing your car might seem like a quick and effective way to restore its shine, especially if you're a DIY enthusiast. Many people believe that using a pressure washer can clean their vehicle faster than traditional hand-washing and waxing. However, this method comes with risks if not done properly.
In today's world, where staying home is often preferred, it might be tempting to clean your car yourself. But without the right knowledge, pressure washing can do more harm than good. It can strip paint, expose metal, and even lead to rust over time.
Before you grab a pressure washer, here’s what you need to know to avoid damaging your car.
**How to Correctly Pressure Wash a Car**
Contrary to popular belief, pressure washing isn’t just about blasting water at high speed. These systems can be electric or gas-powered, and they offer different settings. The key factors to consider are PSI (pounds per square inch) and GPM (gallons per minute). PSI refers to the pressure of the water, while GPM measures how much water flows per minute. Together, they determine the cleaning power.
For most cars, 1,200 to 1,900 PSI is safe, along with 1.4 to 1.6 GPM. Using higher pressure can damage your car’s finish. Also, choose an electric unit instead of a gas one—gas models can be too powerful and may crack your windows.
The nozzle angle matters too. A 15-degree nozzle is ideal for rinsing or applying soap, while narrower angles can be too harsh for paint. Always make sure the car is parked away from plants, walls, or people to prevent accidental damage.
Before starting, close all doors, windows, and the trunk. Stay at least four to five feet away when rinsing. Use a car-safe detergent and make sure your brush is clean to avoid scratching the surface.
Wear closed-toe shoes, as the pressure washer stream can cause serious injury if it hits your feet.
**What Can Go Wrong**
According to Consumer Reports, pressure washing your car is not recommended. High-pressure streams can scratch or strip paint, leading to rust. Even small particles in the water can act like sandpaper, causing scratches.
Many people don’t clean their car thoroughly before pressure washing, leaving dirt that becomes abrasive under high pressure. If your car already has chipped paint, pressure washing can worsen the damage.
Older or classic cars are especially vulnerable. Their paint and metal are more fragile, and pressure washing can accelerate aging and rust.
Inexperienced users often make mistakes like standing too close, using too high a pressure setting, or washing from bottom to top. Some also try to wash sensitive areas like the engine or plastic parts, which can cause further issues.
Using the wrong type of cleaner, such as dish soap or laundry detergent, can also harm your car’s finish. Always use a product designed for vehicles and follow the dilution instructions carefully.
If you’re unsure about the process, it’s best to leave it to the professionals. At DaSilva’s Auto Body, we offer expert exterior detailing and rust removal services. Contact our Naugatuck location today to schedule an appointment and keep your car looking its best.
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