For the close-combat-weapon I added a fur pelt across the top, a skull and trim on the front face, removed a cable and replaced it with "Power Cable" made out of a section of necklace I picked up at Michael's. Lastly, I cut notches into the fingers and cut out sharp finger tips from styrene card stock.
The Lascannon received a Green Stuff wolf icon. The hash marks help the Green Stuff adhere to the plastic. I then spread a ball of GS across the side of the lascannon and carved out the wolf using a x-acto knife and dental tools.
The Missile Launcher and Multi-Melta get the same treatment.
I also added a bit of small chain to the missile launcher. I got this from Michael's craft store. Check out their jewelry section. There are a lot of great necklaces that can be used as chain and power cords.
The legs of Dreadnought number 1 were missing the shin guards.I fixed this by cutting a piece of styrene tube to length and then cutting it in half. I applied those to the front of the legs and finished them off with some more Apoxie Sculpt fur and a Green Stuff banner. I "Wolfed up" the feet by cutting notches into the toes and cutting some sprue into claws.
Dreadnought number 2 still needs a lot of work. I'veadded plenty of fur, some wolf details, a banner, and I've used some green stuff, styrene tube and a space marine head to create a "Venerable" feel. I added a skull to the shin and claws to the toes again. For the classic wolf skull and cross bones I created a push mold of an original using Apoxie Sculpt and used that to press a Green Stuff duplicate.
A coat of Wolf Grey primer and base coat from Army Painter really starts to pull it all together.