Not only do they work, but at least here in CA, the car wash owners must
trap the toxic sludge that comes off of your car so that it does not
become "runnoff" that pollutes a stream, bay or lake.  Runoff is a huge,
destructive source of pollution that we as individuals can actually do
something about.

GMBulley wrote:

> In a message dated 98-05-15 22:11:51 EDT, bloss@ENTER.NET writes:
>
> << > What's a good way to clean the underside of the van, to get off
> all
>  > the dirt and stuff, besides using the hose and just blasting it
> off.
>
>  Start with a foaming engine degreaser, then hose it off.  Great for
>  finding leaks since you're starting with a clean "slate." >>
>
>  Here in the beautiful south, and in some other areas of the country,
> there
> are "wand washes", with stalls and pressure washers. Many have a
> setting for
> degreasing goo. I find these invaluable for keeping the underside
> immaculate,
> and for locating undercoating that no longer wants to see the world as
> part of
> our van.
>
> gmbulley
> cary, nc