It’s not as effective as rust penetrant, but WD-40 will work in a pinch for removing rusted screws. Better yet, mix 50% WD-40 ...

Learn More › If you regularly repair old machinery or other things around your home, you’re bound to run into rusted screws. As long as you keep the right tools and supplies on hand ...

Depending on the size and portability of the item with the rusted screw ... tight nooks and crannies before you attempt to loosen the screw again. Read the original article on House Digest.