How to clean garage floor that I want to paint?

Cindy Rubin
by Cindy Rubin

The cement garage floor is dirty, greasy and stained with God knows what! I'm thinking of cleaning it and then painting it. I want to put the house up for sale and going through the garage into the kitchen is the main entry way to the house (convenient). I don't want that floor to be the first thing potential buyers see. If not paint... is there any other options?

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