Has anyone here undersealed an L405? There are a lot of steel components which are widely documented to rust despite the aluminium monocoque.

I use lanoguard on mine, there are a few shields I’d love to remove sandblast and galv one day. Maybe something to pick up from a scrap and do.

I would dintrol it, but there is allot that’s difficult to get to in order to properly prep and I wouldn’t want to just cover it over. Sold - Bell a 2015 MY16 Loire Blue Autobiography 4.4 SDV8
Previously George a 2007 MY07 Java Black VSE 3.6 TDV8
Previously a 04 MY04 Defender 90

Most of the steel stuff is bracketry, which I wouldn’t be too concerned with protecting. Used to do it to stop floor panels etc rotting or chassis members, but with the main structure of the 405 being aluminium I’m personally not worried if occasionally a crossmember shows a bit of rust. If at some point it get too bad then it’s an unbolt and bolt on a new bit….. much less messy and hassle than trying to treat the whole of the underside of a car which won’t rust….. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2010 LR D4 Commercial 2.7 TDV6

The problem is when the rust creeps between the bracket and the aluminium it’s bolted to, aluminium is great until it starts to corrode and once the paint is broken and you have two dissimilar metals touching it only takes a bit of water or salt to really accelerate the process.

Everything on my Lotus has Duralac on the fittings, and I used it pretty heavily on the Defender but keeping the steel/aluminium covered in something should help keep the electrolyte out IMO. By the time it’s rusty enough to warrant bolting on a new one the aluminium might already be pretty corroded! Sold - Bell a 2015 MY16 Loire Blue Autobiography 4.4 SDV8
Previously George a 2007 MY07 Java Black VSE 3.6 TDV8
Previously a 04 MY04 Defender 90

I’ve waxoyled mine, concentrating on any metal work including tank saddles but mainly the ARC pipes, these are only on the SDV8 on the L405 but can be expensive to change as are a PIA to do due to the route they take. I removed the plastic panel under the sill, drivers side then gave it all a good coating. The brake pipes also corrode on the L405 so is worth a coating to save an MOT fail as they get older.

Thank you all. I will get it on the ramps and get it sorted.

TJH1985 wrote:

The problem is when the rust creeps between the bracket and the aluminium it’s bolted to, aluminium is great until it starts to corrode and once the paint is broken and you have two dissimilar metals touching it only takes a bit of water or salt to really accelerate the process.

This. We've already seen a few worrying looking cars in...

Oh the joys of living in Scotlandshire...

Mikey wrote:

TJH1985 wrote:

The problem is when the rust creeps between the bracket and the aluminium it’s bolted to, aluminium is great until it starts to corrode and once the paint is broken and you have two dissimilar metals touching it only takes a bit of water or salt to really accelerate the process.

This. We've already seen a few worrying looking cars in...

How do you even begin to repair that? Sold - Bell a 2015 MY16 Loire Blue Autobiography 4.4 SDV8
Previously George a 2007 MY07 Java Black VSE 3.6 TDV8
Previously a 04 MY04 Defender 90