kinds of paint for the job

I am painting the interior of a 1955 chevrolet nomad (red and white). I thined the white paint to a “milk” consistancy (with acrilic thiner), then put on several coats. I think the paint is too runny so I tryed one straght from the bottle and I got the same result. Is the problem the paint, the mixture, or the painter? I am going to paint the out side red and white too, but with an air brush. I was going to use enamel. so yea any sugestions?

Lets see if ive got this right you thinned your acrylic paint and apllyed it by brush am i right? If so for some reason acylics dont brush on well. If i did not answer your question iam shure someone will give you the correct answer.

yea that was the question, thanks soo much!