5. That under-coats should dry harder and more quickly than those above them, and that the difference in drying between adjoining coats should not be very great.

6. That the quality of the binder is equally as important as the quality of the pigment.

7. That the quantity or weight of pigment used is equally as important as its quality or volume.

8. That the time and method of application are equally as important as the quality of the paint.

9. That no accelerated tests can be the equivalent of a long-time service test.