PWD Iron Horse 30ml Isobutyl Nitrite Solvent Cleaner from Poppers Los Angeles. When you open the bottle of PWD Iron Horse 30ml, you will have a great fast start and be kicking up dirt all around you. So you'll need a powerful cleaner to smooth out all of the dirt that was brought up as you left the gate like a bucking bronco. This one will put your money where your mouth is. The odds are that you will win the cleaning race, putting you on top and not being left behind in the dust. It's a sure bet that you will enjoy this potent cleaner and the thrill of the race it creates. Win the cleaning race with PWD Iron Horse 30ml. It has a light scent and works fast and lasts long. Clean carefully as directed on the bottle.