I think the key here to this nick problem is that the razor is dull and rather than stop shaving and address the problem people naturally try and compensate by pressing harder on the razor against the skin and thats where the problem begins. For me if I get a new or recently bought used razor and I think its shave ready I use it on my chin which is the toughest area to shave. If its just glides around my chin and smoothly cuts the hairs its shave ready. If I have to really push it around its back to the hone.

I realize for many beginners its frustrating and you want to shave but you shouldn't ever shave with a razor thats not fully up to the task after all yopu wouldn't want to drive around in your car with half the cylinders working or two gears working would you?