How about the raw material of Fabric Ventilation?
Before you unleash the muriatic acid bomb on your driveway, I might suggest renting a 3000psi or stronger pressure washer. Tool Rental yards rent then for about 20 bucks a say, or less for half a day. Be carefull because if you stay on one spot too ling it will actually start eating away the cement.
not possible , [cheaply] just buy a thermo sensor gun
You need an electric furnace or flame hot enough (961.78 °C or 1763.2 °F) and a suitable crucible. Most people do not have enough Silver metal to melt to make this cost effective and search for a local jeweler who can do a small project.
