Yes, we can repair the damage before we replate the cylinder. However, the damage was the symptom and not the cause, and unless you find the cause and fix that, you will continue to experience detonation and will damage your cylinder again.
There are lots of resources online describing the causes of detonation, and you would be wise to learn as much as you can about the causes and remedies. If you don’t feel confident in your own knowledge, talk to your engine builder.
