Copying DVD made on DVD Recorder

Can I use CloneDVD to make a backup copy of a recording made on a DVD Recorder. If so, does the original DVD need to be finalised before copying, in order for the copy to play on another DVD player?

I am not positive about the finalizing, but I always do it and CloneDVD works just fine for my Panasonic. The only exception is RAM discs but Iassume you are not using those as they do not need finalizing.