Can’t assign color or material to solid components imported from Autocad

When importing solids from Autocad, they get imported with the ‘by layer’ color instead of default material (as in previous versions, where I never had this problem) and after importing, it doesn’t allow me to assign a material or color (with the ‘bucket’ command) to the whole solid component but I need to enter in the component and doing it face by face, which too time consuming, especially for group of components.
I hope someone can help.
Never has any of these issues with older versions.

You can use Fredo Tools > ThruPaint