What's the point in it?
Allows for easy on, easy off color application that looks pretty similar to powder coating. At $6-$9/can depending on where you buy it and which color you pick, it's much more cost effective than powder coating, too. It's rubber in a can, though, so it doesn't offer the longevity of powder coating, but easy to patch up. If you don't like it, you peel it off. Doesn't harm the finish, either.