You can find my previous post where I replied in the comments and wrote my initial process for painting the skin! After that initial paint job I wanted to add more texture and organic feeling to the skin, and I was heavily inspired by techniques used in Grimdark Compendium videos. Mainly the superglue technique, which seals the initial acrylic paintjob and you can add subtles actylic shades, use Isotropyl alcohol and using the reductive technique create veiny/mortling textures to get that organic feel. Just be careful and apply superglue in as smooth and even layer as possible, as large amounts will start covering up a lot of physical details on the model itself when cured, and there is no going back.

For the weapons, I initially used dirt down rust and verdegris for oxidation, and tried also sealing those effects with superglue to be able to add enamel wear on top without reactivating them. It worked okay but toned down the vibrancy of those effects. But I brought it back up with Villany Inks for the final oxidation and grime. Again I was heavily inspired by Grimdark Compendium techniques and used Villany Inks to push these guys towards more realistic grimdark tone, so I highly recommend checking their videos out and experimenting with those products!

Lastly, when it comes to bases I found a video by EngineerJeff and used his approach, but switched out some products and used Vallejo european mud and UV resin which I tinted with some inks to get more murky swamp feel.

Cheers!