If you want a tool to help you design a custom car wrap even if you don't have design skills, Car Concepts AI is a great choice. The AI-powered design tool lets you upload a photo of your car and then specify the style you like, and it'll generate a range of creative designs for you. The interface is easy to use, with a simple image upload process and a prompt system to add specific design parameters. It uses a token-based pricing system, so you can use it for a few cents or pay a premium for more.
Another option is NewArc.ai. Although it's geared for photorealistic images and 3D renders, you can also use it to visualize and create custom car designs. You can set an initial image, describe what you want to see, and the AI will generate a range of options. The interface is easy to use, no technical expertise required, and there's a free option with monthly subscription plans for more advanced abilities.