Absolutely. I bought a gallon each of the clean/prep products about 10 years ago, and I still have about 1/3 of each left. And I follow the process to the letter (IIRC, wash, rinse, etch, paint). The cleaning chemical should be diluted, and works best when hot. etc. I've never had a bad experience. I was just pulling one of the KYBs off my Celica that had blown after 8 years to send in for warranty through RockAuto, brake backing plates, lateral links, backing plates and calipers still look great (painted at the same time, seen probably 4 winters since then).