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General => Detailing => Topic started by: Carl_45 on 07 February 2022, 13:03

Title: Underbody care
Post by: Carl_45 on 07 February 2022, 13:03
The delivery of my Clubsport 45 is now imminent. I’ve bought some VW dynamic centre caps that have already arrived, so I think my first job after the 20 mile (probably longer due to going the indirect route  :whistle:) journey home is to jack up the car and remove each wheel to fit the centre caps.

I was thinking, whilst doing this maybe I should treat the underbody where possible since it’s in the air (I’ve got a hydraulic jack) with the wheel off?

Is it worthwhile doing this? I don’t want to go mad and I don’t have any experience in this, I was hoping for something that I could just spray around (almost randomly) that will give some protection to the bits it’s meant to and won’t damage the bits it shouldn’t really be on in an ideal world?

Any thoughts on what I should use? Hammerite wax oil spray maybe?

How thoroughly will I need to clean the car if I do it on the first day, a quick pressure wash will hopefully do?

I’m sure there’s loads of advice on how to do a full and fantastic job (my TVR was done professionally before I got it), but to be honest, I’m looking to see if it’s worth the token gesture since the car is brand new and the wheels are off.
Title: Re: Underbody care
Post by: Watts on 08 February 2022, 08:18
Take a look at Volkswizard on youtube, he did a video of protecting the underside of his new clubsport.
Title: Re: Underbody care
Post by: Carl_45 on 08 February 2022, 11:13
Take a look at Volkswizard on youtube, he did a video of protecting the underside of his new clubsport.

Thanks. I actually saw that last night. As he did I think, sprayed almost randomly on anything metal avoiding the brakes and exhaust.

I also looked up that product on euro carparts, think I’ll get a tin.

My thinking is that something is better than nothing and I should take this opportunity since everything is clean and the wheels are off anyway.
Title: Re: Underbody care
Post by: VW_Golf_nut on 08 February 2022, 11:55
Dynax UC is best product to use, I have used on past 3 Golfs, I apply to everything underneath bar exhaust. I brush on, not spray as can't cope with the thought of over spray on paintwork!
Title: Re: Underbody care
Post by: LazyLunatic on 09 February 2022, 23:33
I couldn’t bare the thought of spraying the underside of a new car. Genuine question - is it actually necessary?

Secondly, is there not a load of plastic bits and stuff to remove? I have removed all the lines, exhaust, tank, etc on my Jetta.
Title: Re: Underbody care
Post by: VW_Golf_nut on 10 February 2022, 06:02
Yes, if you severely OCD like me! Give it a year or so and most painted parts will start to show signs of corrosion. I don't remove any trim. I apply with a brush.
Title: Re: Underbody care
Post by: theminty1 on 10 February 2022, 12:44
Yes, if you severely OCD like me! Give it a year or so and most painted parts will start to show signs of corrosion. I don't remove any trim. I apply with a brush.

So if you have ocd then should you not paint the painted areas first to give a thicker layer, then if you want apply protectant waxy stuff.
I know when I eventually get a new golf that's the way I will do it. Its the aluminum corrosion i don't like in the engine bay. I had tried the ACF50 at the time but limited results and it gets dusty pretty quick. A new car start to corrode/paint peel surprisingly quickly.
Title: Re: Underbody care
Post by: VW_Golf_nut on 10 February 2022, 16:59
Yes, if you severely OCD like me! Give it a year or so and most painted parts will start to show signs of corrosion. I don't remove any trim. I apply with a brush.

So if you have ocd then should you not paint the painted areas first to give a thicker layer, then if you want apply protectant waxy stuff.
I know when I eventually get a new golf that's the way I will do it. Its the aluminum corrosion i don't like in the engine bay. I had tried the ACF50 at the time but limited results and it gets dusty pretty quick. A new car start to corrode/paint peel surprisingly quickly.

Probably, yes! But I have a limit and the BH Dynax just about keeps me happy.
Title: Re: Underbody care
Post by: Carl_45 on 11 February 2022, 10:46
Dynax UC is best product to use, I have used on past 3 Golfs, I apply to everything underneath bar exhaust. I brush on, not spray as can't cope with the thought of over spray on paintwork!

I’ve been looking at the dynax UC, I’m ordering some as I’m also getting BH double wax. One question…. With a brush? Do you spray the aerosol in to a container then simply brush on?

I posted before in the mk8 forum, I’m new to detailing and I opened a can of worms last time I asked opinions on “waxing for beginners”  :grin:
Title: Re: Underbody care
Post by: VW_Golf_nut on 11 February 2022, 19:57
Dynax UC is best product to use, I have used on past 3 Golfs, I apply to everything underneath bar exhaust. I brush on, not spray as can't cope with the thought of over spray on paintwork!

I’ve been looking at the dynax UC, I’m ordering some as I’m also getting BH double wax. One question…. With a brush? Do you spray the aerosol in to a container then simply brush on?

I posted before in the mk8 forum, I’m new to detailing and I opened a can of worms last time I asked opinions on “waxing for beginners”  :grin:

It's a very good product, I have purchased a 5ltr, I let the whole tub sit in warm water / the sun for 30mins or so before I plan to use, then pour into a disposable container (milk carton with the top cut off is perfect) the apply with a brush, normally just get some cheap ones from B&Q. The one with the angled head is very good for getting into tight spaces as I like to ensure everything metal/painted has been coated, even bolt heads!

Title: Re: Underbody care
Post by: dubber36 on 16 February 2022, 08:07
This is what a local detailer, trussed and recommended by many classic car restorers uses,

 https://www.lanoguard.co.uk/products/lanoguard-vehicle-underbody-and-chassis-care-kit
Title: Re: Underbody care
Post by: joe6 on 15 March 2022, 10:29
Underbody trays such as those on golfdave thread on mk7 forum are worth considering as further protection from stones etc.
Title: Re: Underbody care
Post by: Mikeyd1 on 20 September 2023, 07:10
My car is coming up 6.5 years old so I thought I’ll give the underbody a jet wash and a couple of coats of dynax uc (keep the rust at bay on the subframes and suspension)
(https://i.postimg.cc/k4P8662J/IMG-2164.jpg) (https://postimg.cc/t1D78gdw)

(https://i.postimg.cc/yYGD3gGM/IMG-2165.jpg) (https://postimg.cc/fJxz6LDC)
Title: Re: Underbody care
Post by: willni on 20 September 2023, 20:35
My car is coming up 6.5 years old so I thought I’ll give the underbody a jet wash and a couple of coats of dynax uc (keep the rust at bay on the subframes and suspension)


I wish mine looked like that! Currently buying supplies to grind the rust off and respray mine underneath.
Title: Re: Underbody care
Post by: Mikeyd1 on 22 September 2023, 21:04
To be fair I should have done  a before picture , it looked a lot worser with crusty bits all over in including the shocks. And the rear subframe arms were at least 3x worse at the front than the back . The dynax uc turns most of the rust to a darker colour .
Title: Re: Underbody care
Post by: joe6 on 05 October 2023, 10:51
To be fair I should have done  a before picture , it looked a lot worser with crusty bits all over in including the shocks. And the rear subframe arms were at least 3x worse at the front than the back . The dynax uc turns most of the rust to a darker colour .
That's the benefit of the rear suspension plastic aero covers. They protect the front of the arms.
Title: Re: Underbody care
Post by: Mikeyd1 on 07 October 2023, 21:17
Yes a good little upgrade . I need some at some point when I look through and find the part no’s