I do not personally believe it is safe to skim mold off of a ferment and go on to consume it. Mold travels throughout, even if you cannot see it. Mold also creates toxins. It may be kahm if it is thin with bubbly patches. Mold generally results in thicker patches that look furry. Either way it will affect the taste of your ferment, and mold definitely affects the health. In cases of mold, I would definitely toss. I also toss if kahm yeast forms but kahm is generally thought to be safe and many choose to skim it off and consume as normal.