Warts:

Rub a Banana peel or castor oil

Body mask:

Oats + Milk Powder + Mosambic juice
Apply it for 15 minutes. This pack will enhance the skin texture and also add glow to it. Those who are allergic to citric acid use honey. This will lighten the sun tan, dark patches, dark spots.

Stretch Marks:

Use Cocoa Butter when you are in the sixth month.
Coconut oil can be used to prevent the breakage of elastin and collagen

Dark Elbows & Knees:

Exfoliate the skin using scrubber. Also moisturise it with honey.
Wheat Husk + Lemon juice.
Also You can try any of the face pack too.