BFC and parts

[Travis Cobbs]

Its actually in the BFC spec itself. CCW is desired not required except for primitives:

"It is desirable for all files to use the same winding. When possible, files should use counter-clockwise winding. The actual winding for any part is left to the file author. Primitives should always use CCW winding."

Based on that, I still think that if you enable BFC on a non-BFC part, and it comes out almost all red, setting CW as the winding is a reasonable thing to do.