What is the correct mixture ratio paint to thinners and clear to thinners?

depends on what paint your using. acrylic is upto 50% paint to 50% thinners (same with acrylic clear) and two pack (2k) also depends on what you've got. MS (medium solids) clear or solid colour (not metallic) is 3:1 (3 parts paint : 1 part hardener) and high solids 4:1. hope this helps!?!?!? Basically if it has a hardener then it is two pack (2k) enjoy! :)