Underbody cleaning

[Jonny TVR]

I have a concours classic car but intend on using regularly. The underside is immaculate. Just wondering how I keep this looking good. Obviously regular pressure washing under the wheel arches but how do I get under the car easily. Have seen a karsher attachment that looks good. Any suggestions?

[chilluk7]

I have one of these and would recommend it :

Karcher Car Chassis Cleaner Attachment

[Jonny TVR]

chilluk7 said:

I have one of these and would recommend it :

Karcher Car Chassis Cleaner Attachment

thanks and bought it

[tharriso]

Will spraying detergent underneath wash all grease etc away that is looking after stuff. So it will always be "raw" to oxidising?

[Jonny TVR]

tharriso said:

Will spraying detergent underneath wash all grease etc away that is looking after stuff. So it will always be "raw" to oxidising?

Thats a good point but the car is stored in a carcoon which will reduce moisture. just wondering whether a wax should be applied to the underside.

[chilluk7]

That Karcher Chassis Cleaner has a nozzle that lets you apply their chassis wax

[Winky151]

I use one of these on a regular basis:-

https://www.tooled-up.com/karcher-angled-spray-lan...

but also at the start of spring & before winter I get the car as high as possible on axle stands with the wheels off & arch liners out & lay underneath it with the pressure washer. Yes I get wet but also can see every bit that gets done/missed by the angled lance.

[Jonny TVR]

Thanks All .. normal people would think we are mad!

May even was the underside for winter.

[V8covin]

There's people who won't take their cars out at the slightest chance of rain and then there's those pressure washing underneath forcing water into places water wouldn't usually get.
Car enthusiasts can be strange folk ☺️

[Stickyfinger]

Jonny TVR said:

Thats a good point but the car is stored in a carcoon which will reduce moisture. just wondering whether a wax should be applied to the underside.

Not if you use it regularly........get the car under-sealed with Dynax clear wax.

[Jonny TVR]

Stickyfinger said:

Not if you use it regularly........get the car under-sealed with Dynax clear wax.

Thats a really good point. Going to get some advise on clear underbody rust protection. The chassis has been injected but no other treatment elsewhere. I won't be using either in wet weather, they will be stored in carcoons and will do around 2.5k miles a year each.

[Stickyfinger]

Jonny TVR said:

Stickyfinger said:

Not if you use it regularly........get the car under-sealed with Dynax clear wax.

Thats a really good point. Going to get some advise on clear underbody rust protection. The chassis has been injected but no other treatment elsewhere. I won't be using either in wet weather, they will be stored in carcoons and will do around 2.5k miles a year each.

"I have a concours classic car but intend on using regularly."

forgive my mistake.... but 2.5k and no rain (in the UK ?) is not really "regularly" is it

Use Dynax-UC from Bilt&Hamber
https://www.bilthamber.com/corrosion-protection-an...

Edited by Stickyfinger on Thursday 14th September 10:43

[PositronicRay]

V8covin said:

There's people who won't take their cars out at the slightest chance of rain and then there's those pressure washing underneath forcing water into places water wouldn't usually get.
Car enthusiasts can be strange folk ??

I avoid pressure washing, I've seen what it does if it finds a chip/flaw in paint or UB protection. (Or to my patio when used in anger)

[Jonny TVR]

Used the Karcher underbody yesterday and what a great product. Very effective.

The problem with even the clear treatments underbody is that they will attract dirt/ dust. I'm going to leave it untreated and just keep it clean and dry. Storing in a carcoon as well so should be ok