not sure if answering to piracy is a good thing
but for 3dcoat, like in any modeling tool, you could export fbx, and it will work on ue4, but as usual, try too keep a devent polycount.
Dont be a cheapskate. 3D-Coat is exceptionally cheap software, whos creators are a small team who’ve worked very hard to create a product that competes with both z-brush AND substance, whilst being easy enough to use you can be productive in a day. All for under $100 for amateur use (And if your using pirate software for professional use, shame on you). If game making is your passion, show some respect to the people who make your passion possible.
I understand if your poor, but for god sake man, at least have some decorum and don’t advertise the fact your planning to steal from small-businesses. Have some dignity.
And yes, and yes, to both questions. Shame on you.