19. Gather supplies beforehand.
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This is the most important step. Not having all of your supplies at the ready can lead to an incomplete job, and you want to knock it all out at once! Moreover, you could be tempted to substitute one product for another, which in the world of car care products, can easily lead to damage. Round up your upholstery cleaners, tools and towels, soap, and anything else from this list that grabs you. Store it all in a bucket or two so you’re never caught in the driveway wondering, “Hey, where did I put that…?”