IN A RECENT INDEPENDENT METAL POLISH STUDY PERFORMED FOR MOTORHOME MAGAZINE, ZEPHYR PRO 40 METAL POLISH RECEIVED THE HIGHEST SCORE OF 18 POPULAR METAL POLISHES TESTED. IN FACT, ZEPHYR PRO 40 WAS THE ONLY PRODUCT OF THE BUNCH TO RECEIVE A PERFECT SCORE! THE FOUR POINTS OF CONSIDERATION, OR AREAS OF TESTING INCLUDED: EASE OF USE, VALUE, CUT, AND SHINE. THIS STUDY, WHILE IT DID NOT INCLUDE MANY BRANDS ADVERTISED ON THIS WEBSITE, DOES COMMEND ZEPHYR PRO 40 AS AN EXCELLENT CHOICE OF METAL POLISH. ONE OF MY POLISHING CUSTOMERS ESPECIALLY PREFERS PRO 40 ON STAINLESS STEEL.SOME CUSTOMERS CALL IT "THE ULTIMATE MAINTENANCE POLISH." SIMPLE, QUICK, AND EASY - THIS IS A FITTING SUMMARY OF ZEPHYR PRO 40 METAL POLISH!