I did attempt several times to voxel sculpt a car body in 3D Coat but I find 3D Coat hard to get good dimensions and scale. And 3D Coats auto retopo is hit or miss for me. Blender's Quad Remesher is much easier and I find I get much better results then 3DC auto retopo. I have manually retopo'd in 3DC but find the manual retopo process is much longer and more tedious then modelling the original source object.