How can I make the color look more realistic.

I do alot of photoshop with pics of my car.
What would be a way to make the new color
of the car look like real paint.
Sorry if the question sounds stupid!

What is the real color of your car?
If it's colorless (black, whie or gray) it's pretty difficult to make it look realistic.

Otherwise, if it's red, blue or some other color, it shouldn't be too difficult to look photorealistic.

It’s like a blue/green. Like a turquoise. What are some of the tools
I would use to do that? Or putting diff. Wheels on the car

I've got some tutorials on modifying cars in photoshop -> www.astudios.org

About the "painting";

Just make a selection (LassoTool) around the chassi, and make a new layer, fill it with the new color, and change the LayerMode to "hue" <-- that's the easy way.

Use the quick mask mode, if you can trace you can quick mask