I come from a lot of older toyota trucks and if they dont get undercoated the frame turns into swiss cheese. So I have not undercoated from 2019 to now so would something like this need undercoating and what is reccomended i see a little rust starting to form on some parts. I have good experiences with woolwax just was wondering if anybody else has experience?

 

The Discovery is aluminum. Aluminum doesn't rust. Aluminum does corrode, but it isn't a big problem like rust. For the few steel components underneath, its most likely just surface rust, and I wouldn't worry about it - a bit of paint would be sufficient.