49 to help prevent such damage the high pressure wand 52 is covered with a foam jacket 72 shown in fig1 as further protection to the car an obstruction detection apparatus 74 detects if the wand 52 has made a significant contact with the car the obstruction detection apparatus 74 is shown in cross section in fig5 fig3 is the cross sectional side view of the portion of the gantry 12 shown in fig2 the motor and gear box 70 set on a trolley 94 which spans between the cross beam 62 and a second cross beam 96 a third motor and gear box 98 also mounted on the trolley 94 has a shaft 100 attached to a gear 102 which engages a toothed rail 104 attached to the cross rail 96 to selectively move the trolley 94 and high pressure wand 52 across the width of the front and back of the car 49 fig4 is a side view of the panel 24 and the five plastic pipes 28 with their nozzles 30 the plastic pipes 28 deliver the solutions from rubber tubing lying 106 on the rail brackets 40 the rubber tubing 106 has not been shown in fig1 on order to clearly show the rail 36 bracket 32 and 40 in operation the car 49 is driven into the enclosure 22 and two types of soap are sprayed on the car 49 from the appropriate nozzles 30 on the soap pipes as the gantry 12 is moved from the front of the car to the back of the car after the soap has been sprayed on the car wash machinery stops for a predetermined time to let the soap loosen.