FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Old wash primer coats may be overcoated directly with epoxy finishes is the correct statement regarding paint system compatibility as per aviation maintenance practices.

Wash primers are often used as a base coat to promote adhesion between the metal surface and subsequent coats of paint. It is possible to apply epoxy finishes directly over old wash primer coats without having to remove them first because of their compatibility. This saves time and effort in the painting process while ensuring that the new coating adheres well to the surface.

Option A is incorrect because latex paints should not be applied directly over enamel without proper surface preparation to ensure good adhesion.

Option B is incorrect because epoxy finishes do not always need to be removed before reapplication; they can usually be recoated after proper surface preparation.

Option D is incorrect because polyurethane finishes, like other paint types, may have specific compatibility requirements with primers and may not be universally compatible with all types of primers.