Spit Shine your iPhone to look Brand Spanking New
Even though I use a Speck case to guard my iPhone from the dangers of outward scratches, it still somehow manages get itself in a mess of trouble. Thank god to MacRumors' forum who's found a pretty awesome way to get that old cruddy iPhone of mine back into tip top condition.
But be forewarned, it can be a pretty hardcore process involving sanding, waxing, and dare I say... polishing. Yeah, it's not going to clean itself so you're going to have to put a little bit of work into it but as the photos above show, it's well worth the effort and costs less than $20 to do.
Also, don't be alarmed that in the "After" example image the Apple logo is missing; if you follow the directions to the T you can keep your Apple pride shining bright for everyone to see.