1. (1) No owner or operator shall apply any coating to aerospace vehicles or components unless one of the following application methods is used:

   1. (a) Electrostatic application;
   2. (b) Flow/curtain coat;
   3. (c) Dip/electrodeposition coat;
   4. (d) Roll coat;
   5. (e) Brush coating;
   6. (f) cotton-tipped swab application;
   7. (g) High-Volume, Low-Pressure (HVLP) Spray;

   8. (h) Hand Application Methods; or

      1. (i) Other coating application methods that achieve emission reductions equivalent to HVLP or electrostatic spray application methods, as determined according to the requirements in 40 CFR 63.750(i).

2. (2) The following conditions are exempt from R307-355-6(1):

   1. (a) Any situation that normally requires the use of an airbrush or an extension on the spray gun to properly reach limited access spaces.
   2. (b) The application of coatings that contain fillers that adversely affect atomization with HVLP spray guns and that cannot be applied by any of the application methods specified in R307-355-6.
   3. (c) The application of coatings that normally have dried film thickness of less than 0.0013 centimeters (0.0005 inches) and that cannot be applied by any of the application methods specified in R307-355-6.
   4. (d) Airbrush application methods for stenciling, lettering, and other identification markings.
   5. (e) Application of specialty coatings.

KEY: air pollution, coatings, aerospace

Date of Last Change: March 8, 2018

Notice of Continuation: February 1, 2023

Authorizing, and Implemented or Interpreted Law: 19-2-104(1)(a)