Who is liable for damages incurred at a carwash?

Q: I own a carwash where I employ staff to wash the cars of customers who come to get their cars cleaned.

I erected a sign informing the customers that neither my staff nor I will be held liable for any damage caused to their vehicles on my premises, and entry is at their own risk. Is this permissible?

After making this declaration, if one of my staff accidentally damages a customer's car, who is responsible?

Will a graze without flowing blood break wudhu?

Q:

1. Would a graze that isn't flowing out blood, but would leave a faint print of blood on anything it came in contact with, break your wudhu?

2. In the above mentioned situation, say if the non flowing blood continuously came in contact with another part of the body or clothes etc., is it compulsory to wash that part of the body or clothes before performing salaah?

Wakeel (agent) making improvements to item before selling it

Q: I earn a living by selling cars. I go to auctions and buy second-hand cars. Thereafter, I leave the car with a dealer who has a showroom. The dealer sells the car for me and we split the profit according to a pre-agreed percentage (e.g. 50% each).

Before selling the car, the dealer sometimes has some work done on the car such as repairing wind-screen chips, touching up the paint, changing the tyres, etc. The cost for this work is deducted from my share of the profit. Is this permissible?

Can a Muslim Inherit from his Non-Muslim Relative in a Non-Muslim Country?

Q: 

1. In a non-Muslim country, can a Muslim inherit from his non-Muslim relative? Please explain the Shar’ee ruling in the case where the non-Muslim relative left a will or did not leave a will.

2. I was informed that there is a fatwa attributed to Hazrat Moulana Thaanwi (rahimahullah) which says that it is permissible for Muslims to inherit from their non-Muslim relatives in India. Is this correct?