Is the Ghusl valid if there is a colored substance on the skin or an unremovable material under the nails, such as charcoal?

GhuslSkinNails
Is the Ghusl valid if there is a colored substance on the skin or an unremovable material under the nails, such as charcoal?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 1 year ago

If there is just a color on the skin or the nail, it does not harm Ghusl, but if the substance formed a layer preventing water from reaching, then Ghusl will be invalid unless it was for medical reason (Jabeera) where wiping over the bandage  is allowed.

Wassalam.