With the current situation, doing it yourself at home seems more appealing than ever. But if you don’t know how to use a pressure washer properly, you could end up damaging your car. The high-pressure stream can strip off paint, expose metal, and even cause rust over time.

If you're planning to try this, here's what you need to know before you begin.

How to Properly Pressure Wash Your Car

Contrary to popular belief, pressure washing isn't just about blasting water at your car. These systems come in electric or gas-powered models, with adjustable PSI (pounds per square inch) that determines the force of the water. There are also different nozzles that control the spray pattern, and some units allow you to add soap for a deeper clean.

To avoid damaging your car’s finish, keep these tips in mind:

• PSI and GPM: PSI measures pressure, while GPM measures flow rate. For a car, aim for 1,200 to 1,900 PSI and 1.4 to 1.6 GPM. Anything higher can damage the paint or even crack the windows.
• Electric vs. Gas: Gas units are more powerful, but for cars, electric models are safer. High pressure from gas washers can be too strong and risk damage.
• Nozzle Angle: Nozzles range from 0 to 65 degrees. A 15-degree nozzle is best for rinsing, while lower angles are too intense for the car’s surface.
• Location Matters: Make sure the area is clear of people, pets, and fragile objects. Pressure washing can damage surroundings or cause injury.

Before starting, close all doors, windows, and the trunk. Stay at least four to five feet away and rinse off mud first. Use a car-safe detergent, and make sure your brush is clean to avoid scratches.

Wear closed-toe shoes—pressure washer sprays can be dangerous if they hit 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 like gravel can become dangerous when combined with the water jet.

Here are some common mistakes made by inexperienced users:

• Failing to fully clean the car and undercarriage first can lead to scratches from dirt caught in the pressure stream.
• Chipped paint can worsen with pressure washing, causing more damage.
• Older or classic cars are especially vulnerable due to aging materials.
• Incorrect technique—like standing too close, using too much pressure, or washing from bottom to top—can do more harm than good.
• Some parts, like the engine or plastic components, should never be washed with high pressure.
• Using the wrong cleaning products, like dish soap, can harm your car’s finish.

Instead of risking damage, consider professional help. DaSilva’s Auto Body offers expert exterior detailing and rust removal services. Contact our Naugatuck location today to schedule an appointment and keep your car looking its best without the risks.

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