What is the mixing ratio of thinner in auto paint?

The mixing ratio of thinner in auto paint typically ranges from 10% to 30%, depending on the specific type of paint and the desired consistency. For most applications, a common starting point is to mix one part thinner with four parts paint (25% thinner). Always refer to the manufacturer's guidelines for the specific paint being used, as ratiOS can vary. Proper mixing ensures optimal application and finish quality.