An applicator assembly for treating a contoured surface including an attachment frame configured to secure and position an applicator head. In some embodiments, the applicator head is configured to apply a surface treatment to the contoured surface. The applicator assembly further includes, at least one sensor operatively coupled to the attachment frame and configured to scan the contoured surface and produce a contoured data set. Additionally, the applicator assembly includes an applicator actuator operatively coupled to the attachment frame and configured to manipulate the attachment frame such that the applicator assembly maintains an orientation of the applicator assembly relative to the contoured surface.