i just used a steam machine on some old sap spots on a neighbors car.. it is a miricle tool.. held the sprayer over the spot for about 10 seconds ..sprayed a little qd and it came right off
I have the Shark Steamer. Not bad for the price, but the boiler is small enough that it tends to lose the head of steam with extended use (like trying to clean a crusty old engine bay). I've had mixed results with it so far; still playing with it . . .