Curb Appeal 101: Clean stains from your driveway.

Here’s a hint from a November 2004 Popular Mechanics issue: “If you do your own work on your car or other equipment like lawnmowers or chain saws, you’re bound to have oil stains on your garage floor or driveway. Here’s something that works and is basically free: ground-up drywall. Pulverize a small piece with a…