Lanoguard or similar 'underseal' coatings

[d_a_n1979]

Has anyone used this / experience of it?

https://www.lanoguard.co.uk/

I'm looking to (when Spring comes and it'll be dry for a good few days at least); take my E39 touring apart and get areas undersealed to keep it in its immaculate/rust free condition that it's already in (so wheel arches (liners out obviously), sills and other parts underneath).

The obvious choices are the likes of Waxoyl, Raptor, Bilt Hamber etc

Ideally I'm looking for something that isn't a thick black wax; but more towards the clear side

However, it's not a necessity, more of a nice to have as you're not going to see the inside of the wheel arches/sills etc

[droopsnoot]

There's a thread in the classics section on this product, someone was trying it out.