Pre-Rinsing bottom to top

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vicious28shine

New member
I met with a Meguiars rep one time, and one of his tips was rinsing bottom to top when first wetting the exterior of the vehicle and rinsing. does this method honestly make a difference?
 
I always do it....rinse the bottom, sides, top and then work my way back down. Don't know why, just habit from doing it so much and for such a long time.
 
The only reason I can see for that is that the dirtiest part of the car would get rinsed the most - first by starting there and then by all the water running down. I might have to experiment with that.
 
^^^ That's the way I've always done it, the dirtiest panels get rinsed 'twice'
 
Well that does make sense, them rocker panels are usually pretty bad. On the other hand, I have noticed when claying vehicles the roof is always pretty good. Is this do to a negative air space

that exists on most vehicles in that location?
 
vicious28shine said:
Well that does make sense, them rocker panels are usually pretty bad. On the other hand, I have noticed when claying vehicles the roof is always pretty good. Is this do to a negative air space

that exists on most vehicles in that location?
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Its mostly because your horizontal surfaces are going to have dirt/dust/grime sediment settling on them the longest while parked. On SUVs/hatchbacks especially you get larger amount of suspended grime on the hatch/trunk area because of the way the air flows over the top of the vehicle and forms a vortex along the back of the hatch so its constantly getting all of the dirt and debris from the air blown up against it. I've literally spent hours claying a hood and trunk before they're smooth and then only needing a couple passes on the doors and fenders.
 
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