How To Wet Sand a Car – All You Need To Know

What is wet sand a car?

Wet sanding a car is a process that involves using sandpaper and water to remove imperfections in the paint surface and create a smooth, even finish. This technique is often used as a final step before polishing and waxing, and is a great way to bring out the best in your car’s paint.

Here’s what you need to know on how to wet sand a car:


  • Sandpaper(starting with a coarse grit, then moving to a finer grit) Carabrasive sandpaper provide different grit of sandpaper for you.
  • A bucket of water
  • A microfiber towel
  • A soap solution specifically made for wet sanding
  • Masking tape
  • A rubber sanding block
  • A soft-bristled brush

Step 1: Preparation

Before you start sanding, it is important to properly prepare the car’s surface. This includes thoroughly washing the car and removing any dirt, debris, or loose paint chips. You should also use masking tape to protect any areas you don’t want to sand, such as trim, moldings, and emblems.

Step 2: Soaping Solution

Next, create a soap solution by mixing a small amount of the wet sanding soap with water in a bucket. This solution will help to lubricate the surface while you sand, preventing the sandpaper from becoming clogged and reducing the risk of damaging the paint.

Step 3: Coarse Sanding

Begin the sanding process with a coarse grit sandpaper, usually around 400 grit. Dip the sandpaper into the soap solution, then attach it to the sanding block. Wet the car’s surface, then start sanding in a back-and-forth motion, making sure to overlap each pass to ensure an even sanding. After sanding an area, rinse it off with water and check for any remaining imperfections. Repeat the process until you’ve sanded the entire surface, then rinse the car off with water and dry it with a microfiber towel.

Step 4: Fine Sanding

Once the coarse sanding is complete, move on to a finer grit sandpaper, usually around 600 grit. Repeat the same process as before, sanding the entire surface with the finer sandpaper. Be sure to rinse the surface frequently to check for any remaining imperfections.

Step 5: Buffing

After fine sanding, you should buff the surface to remove any remaining fine scratches or swirl marks. This can be done using a buffing machine and a polishing compound. Make sure to follow the manufacturer’s instructions for the buffing machine and compound you’re using.

Step 6: Final Inspection

Once the buffing is complete, inspect the car’s surface for any remaining imperfections. If necessary, repeat the sanding and buffing process until you’re satisfied with the finish.


Wet sanding a car with sandpaper can be a time-consuming process, but it is well worth the effort. Not only does it remove surface imperfections, but it also creates a smooth, uniform finish that will make your car look its best. Remember to always wear protective gear, such as gloves and safety glasses, and take your time to ensure that you achieve the best possible results. Read more: