What’s the difference between No. 415 Cleaner and No. 390 Polish?

No.415 Color-Up Cleaner is an economically designed compound best suited for the removal of clear coat staining, brake dust, oxidation and other paint imperfections that can be commonly remedied by hand use. No. 415 can be used by both hand and DA polisher.
No. 390 Polish utilizes advanced abrasives specifically engineered to remove swirls/fine scratches while leaving behind a professional, mirror finish. To achieve these desired results, No. 390 is designed for machine use only (DA polisher and rotary).