Surface Renew - Repairing cracks in your bathroom sink and changing the color is way cheaper than replacing with a new sink. It looks like new at a fraction of the cost.
Basin and Bath repairs - Royal Repair - Surface repairs specialist, magic man repairs
What causes these cracks on my bathroom sinks?
Magicman | Bathroom Chips, Scratches, Cracks and Holes Repaired
Professional Sink Repairs in London | Fantastic Services
Sink repairs - Bath Repair UK
How can I fix a badly cracked porcelain sink? : r/howto