40k Space Wolves & Daemons Boot Sale Bargain - Help Lawnor identify and fix please (Spring Cleaning)

The wing of the Bloodthirster was damaged and one of the horns/antenna from the Soul Grinder were broken when I got them.  I was considering just going with it and calling it battle damage, but I thought I’d try my hand at doing repairs.  I found myself with some time to kill, but not enough to paint so I boiled the kettle and reached for the Oyumaro instant mould again.  I melted down my previous castings, and wrapped the mould around the other horn, and the 2 neighbouring talons and left them to cool down to room temperature before removing them.  They were given longer still before I cut a slit up the side of each where I hoped no one would see (without needing stitches this time!).  I then stuffed them with green stuff as best as I could.  They were then left for a week to set before popping them out of the moulds.

I then cleaned them up as best as I could and dry fit them to the models along the way to work out which talon to keep, and ensure the fit was the best I could get.  Pin holes were drilled on both sides to strengthen the connection and reinforce the green stuff, and the parts were glued.  A little Vallejo Plastic Putty was used to smooth over the connection for the talon.  I’m hoping once primer is applied that these parts will blend in if you don’t look to closely.  I might yet revisitn them with a hobby knife before then, but perhaps that’s just inviting mistakes?  They are far from perfect, but I’m thinking they already look better than just the damage.

As for basing, I have the Behemoth of Decay from Titan Forge.  I’m hoping to make him visually compatible with my Chaos Daemons.  Take a look at his base.  I’m thinking I can make similar spikes from old bits of sprue, even if I have to keep them smaller.  I can then paint them up as obsidian.  A dark grey, with a hint of blue/green to them, and edge them a brighter version of that blue/green.  Something like the scheme in the second picture.  Perhaps coat them with gloss varnish afterwards?  I have the Realm of Chaos: Wrath and Rapture box unopened.  What do people think of that for basing across both factions?

I prized the models from their bases using a hobby knife, a box cutter, and the small screwdriver I use to get lids off tiny pots of paint and only managed to stab myself the once, with the screwdriver thankfully.  Turns out the feet on the Daemon Prince are tiny separate parts and one came off and broke so needed gluing back together.  The models have had pins put in their feet so I can reconnect them to their bases, once I have painted and decorated them.  I have marked out where the feet will go so I do not stick anything there that might get in the way.

The priming is now done, and I think it looks OK.  It doesn’t quite have the definition of the original parts, but unless I’m looking directly at it, I don’t see whats real and whats home made.  This may change when I come to actually paint them up.

I’m being a little cheeky and tagging this for the Spring Cleaning challenge.  I started the project before that was announced, and I’ll be doing it long after it finishes so I suspect I don’t qualify, but I am continuing during the challenge so no harm in clicking a few buttons in the hopes of winning £50.  I’m taking someone elses long abandoned project, fixing it up, painting it, and even getting some games in over here.