View Full Version : Dirt Spots/Water Spots after Rain

Mike Phillips
Sep 29th, 2008, 01:22 PM
Dirt Spots/Water Spots after Rain (http://meguiarsonline.com/forums/showthread.php?t=27521)

Washed my truck on Friday, so it wasn't freshly washed before it rained, it had been 2 days, (took these pictures on Monday). but the truck wasn't what you would call dirty, just dusty.

Here's some photos of the dirt spots on the hood after a light sprinkle early in the morning.

Original pic #1

Original pic #1 resized to 800 pixels wide

Original pic #2

Original pic #1 resized to 800 pixels wide



Now some of the dirt on the hood could have been blown onto the hood via the wind and then heavier deposits of dirt accumulated on the water puddles/spots. Even so, the end result is dirt on the water spots after the rain because where your car is parked, if it rains it could also be windy.

From the looks of the last two close-ups, it looks like it would be safer to rinse the car really well and then wash it, not wipe it down.

Personal preference.


Markus Kleis
Sep 29th, 2008, 01:27 PM
Yowsers! Those are some scary pebbles and small dirt deposits...I personally would wash my vehicle as well- with an emphasis on the pre-rinse.

I think this would also be a GREAT example of why having a solid coat of wax on the car is crucial- with a coat of wax that dirt should rinse right off of the paint before any wash mitt ever has to make contact with the paint- thus reducing the induction of swirls or marring on the paint.

J. A. Michaels
Sep 29th, 2008, 02:10 PM
That is a great example of when to wash, or qd. I agree, a good prewash before a actual car wash.

Ryan L.
Sep 29th, 2008, 05:12 PM
Nasty dirt on that...I'll try to capture some on a White car, it's even worse.


Sep 30th, 2008, 05:09 AM
The last pictures is scary!
Thanks for the write up Mike :bigups

Sep 30th, 2008, 06:34 AM
Perfect timing! Thanks for the photos. Last night we had one of the So. Cal. rains that typically consist of 79 rain drops..just enough to mess it up. I was debating.....guess I'll wash it.

Sep 30th, 2008, 10:26 AM
Very nice photos Mike. What camera do you use? I think i gonna need a good camera.

This situation is very common in Indonesia. Rain a little then hot.
So i think i should use a pre wash than...

Thanks for the input Mike and everyone.

Mike Phillips
Sep 30th, 2008, 10:29 AM
Last night I washed the truck and then parked where I normally do, so it's been less than 24 hours since it's been washed and it has rained since then so on lunch break I'll check out the hood and see what if looks like and if there's anything to captures on film we'll take a shot.