I am working on rescuing a Nighthaunt Black Coach that I got used ($10!!!!). It was covered in thick primer, sprue clippings, and mold lines. Unfortunately one of the coach's front wheels and the base are missing so I'm going to have to figure that out soon.
The photo above is where I'm currently at after a bath in isopropyl and some diligent mold line removing. Some of the primer is very thick, so it might need multiple soaks.
I'm liking the posts feature!
What a steal! it's such a cool looking model. Looks like you were able to get most of the primer off. The wheel problem certainly sounds tricky. Excited to hear about your solution.