 You can use it on a thousand different applications. And with Blaster's unique ProStraw to control the flow down to just a drop, it's a better way to spray. So pick up a can at a home, hardware, or auto store near you and always use Blaster products and work it like a pro. At Garcia & Company Jewelers, we are buying your jewelry and gemstones. What kind of gemstones? Diamonds over a half carat and precious colored gemstones like emerald, ruby, and sapphire.