Underbody washes in Brisbane

The " laser " wash places that u drive thru do an underbody wash ,

I got one done at rainbow last year, didn't think to do it a second time, it removed so much other carp from under the LC80 we had at the time I thought the salt must have been long gone. I saw painted surfaces that I didn't know existed, she looked brand new. all the built up mud and cow sh1t was gone.
do you really need a second wash???
one thing they don't warn you about at the rainbow one is how hot it gets inside the car, i left the ac and fan on while I went through, hot water on the ac condensor renders it useless so it blew hot air......
put that down to experience....
NickR

The guy who did my rust proofing said not to use those places as they might remove the rust prevention, I think it was the additive that is in the water.
Wazza

The wash on the road to Cooloola (on the North Shore) has some type of oil in the water. Great before going on the beach but when come off and give it another spray the overspray goes onto your paintwork and by the time you get back to Brisvegas it looks like you driven across half the outback cause all the dust and dirt sticks to it and with the current restrictions is a shocker to clean in the front yard with the stickybeak neighbours counting water drops. Another suggestion instead of a high pressure underbody wash is to get your environmentally conscious trigger nozzle (blast, drench or mist till your hearts content), a bit of canvas, a pair of goggles and a six pack at night and spend some quality time under your truck. Perfect on a hot summers night :)
Gotta use less water than an underbody wash plus you can check to make sure everything is still attached or where it should be.

Noel
We utilised the facilities of Car Lovers at Underwood when we came off the beach from Moreton in June and Fraser in July. Due to water restrictions now the line up to get to the car wash at sometimes in the day can be a bit long so you may have to wait in line.

I worry that with those under body washes at Cooloola and Rainbow, If they use recycled water - surely there is salt in the water from vehicles coming off the beach? Will that be pressured further into the body seams than any driving on the beach?