Research: Possibility for getting tougher and thicker skin

Can you get thougher skin and thicker skin

Possible methods:

-Hitting it with the hand palms and fingers.

-Rubbing with sand.
-Hitting it with wood or something else that will make the skin glowing red.

-No or only mild soap. Extreme and dangerous: Not showering for long times. Or only with cold water.

Important: 1 No damage. 2 Giving the skin enough time to heal. 3 Don't overdoing it.