How to tackle rusty underside?

[Yingyz]

Hi all,

I’m in possession of a fairly rusty LS600h from 2012 that unfortunately spent most of its life in Scotland so the underside has quite a bit of surface rust due to salt.

I’m planning on getting a bunch of Bilt Hamber anti-corrosion products and scraping as much of the rust off as possible.

Does the below sound about right?

 

1: Degrease with Surfex HD and rinse off and leave to dry.

2: Wire brush off as much rust as possible.

3: Apply hydrate 80 to reachable areas.

4: Coat with Dynax UB using brush and Dynax spray.

5: Repeat step 4 multiple times to build up 3-4 coatings.

Attached photos to show how the current state of the car. Does it look like surface rust or do I need to find a welder soon?

 

 

 

 

[Malc1]

Did the last MOT mention “ rust “. ? 
Malc 

[VFR]

To my eye I see nothing that needs welding in your pictures. 

Plenty of rust though so needs a lot of attention (as you know) sooner rather than later and what you propose in your plan will do no harm that’s for sure. 

[Yingyz]

1 hour ago, Malc1 said:

Did the last MOT mention “ rust “. ? 
Malc 

No mention of rust, asked tester if I have a rust issue and he said no it’s fine.

 

 Though I don’t think that’s very accurate looking at the photos my mechanic sent me.