PSI for cleaning cars?

You can use chemspec Dry Clean on the seats ...that works great... and then just steam clean the carpet....

I guess it all depends on how dirty the car is.... unless they are complaining about the dry time...who cares... give them a heafty bag to but over the wet seat...lol

Splash,

I guarantee you will not get two hour dry times with the psi's others are recommending.  Try it out for yourself.  The more you work the solution in by hand, the less psi you have to use.  There is not much square footage in a vehicle so you should be able to scrub quick.  I was able to spray down and scrub a car in less than 15 minutes. It is a trade off.  More psi means less elbow grease needed, but much longer dry times.

Jackblack,

Sorry for the ambiguity.  You can lightly spray with straight water or acid rinse (without injecting into the foam and carpet  since this greatly increases drying times) and then extract.

splash_$$$_dash

The only way I would ever clean a car seat is with a Stealth Dry Tool that has an internal water jet. Chop stroke only and never lift the tool to spray. This way you never get the windows, dash and your clothing all wet. And the PSI won't matter as the tool handles the pressure automatically.

P.S.
Never use a stair tool open-jet to clean upholsery. DANGER!