Model Railroader's
"Basic Painting and Weathering" book is what you need to get and read
I'm not a airbrusher,but there's alot of info in that section.
Page 11 recommends using the manufactures thinner when mixing paint.
Buying them in the economy size(large) is not that much more than generic thinner.
After all the work that goes into a project,the painting of it is a very important step.
Do you really what to screw it up saving a couple of bucks on thinner?
If your airbrushing,I;d advise getting this book,it's great,
Got mine,and a few others on Amazon
Good luck
