Scab
A strikebreaker (a bit obvious) or a scab.
When you get a cut, it fresh. Few days later it drys. Then what you call a (scab) is dead skin.
A scab is a person who goes to work when the Union have called a strike.
scab
a kufuzelanter
a scab
clot
The way to heal a scab on the scalp of a person's head depends on the size, and what caused the injury. A smaller scab could be healed by using peroxide. A large scab may need to be looked at by a doctor to determine the best treatment.
A scab.
It is not illegal to call someone a scab, as it is considered a derogatory term for someone who continues to work while others are on strike. However, it may be considered offensive or disrespectful in certain contexts.
If he goes to work at the business that's on strike he's called a scab. If where he's working is not on strike he's just called a mate.