To do hydro dipping, you'll need a few basic supplies. First, you'll need a container to hold the water in. This can be anything from a large bucket to a dedicated tank. You'll also need an air pump and some way to stir the water. Finally, you'll need a way to apply the paint or other coating to the object you're dipping. This can be as simple as a spray gun or as complicated as a conveyor belt system. The most important thing when doing hydro dipping is making sure the object you're dipping is completely covered in paint or other coating. If there are any areas that aren't coated, the water will seep through and you'll end up with an uneven finish. It's also important to make sure the water is at the right temperature. If it's too hot, it can damage the object you're dipping. If it's too cold, the paint or coating will take longer to dry.