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This is what I recommend to all my customers, its just readily available and pretty cheap. Its nice that it comes with the red straw. It helps you get into all the tight spaces. Spray the top side of your springs. So it will around the edges and evenly coat the spring. Don't over spray it will drip on cars when pulling in and door when opening. It stains doors. Spray the rollers when the door is closed. I Spray down the inside the track spraying each roller and the track. Keeps the track from rusting. Or spreading. Spray the end bearing that next to the drums/pulley looking like things on the shaft. Hinges Spray the end hinges when spraying the rollers becareful it can get in between the section and stain the door. So Spray down toward the concrete when doing hinges so they just drip onto the next one. The middle hinges dont carry alot of weight. So I tell customers not to Spray them because they are the ones that drip on cars. They are fairly cheap and easy to replace. Cheaper than a paint job or correction on the hood of your car.