What is the ruling on the 70 riyals that were agreed upon with the erring party after partially repairing the car, knowing that the car is not in its original condition after the repair? And is it permissible to take this amount for the purpose of car maintenance or purchasing spare parts for it?

If the aforementioned amount is what remains of the actual damage value estimated by specialists and agreed upon by the person who caused the accident, and then he procrastinated in paying it, then it is permissible to take it by the aforementioned trick, whether the car was sprayed or not. The right of the injured party is not limited to the cost of repair, but also includes the value of the depreciation suffered by the car due to the accident, as Sheikh Ibn Uthaymeen mentioned. So, the amount paid is a right of the questioner, and in fact, his actual right might be greater than that.