Researching this on the web seems to indicate that the process is called "Daily dermal debridement"
It appears that wound debridement is a treatment used to remove dead flesh to reduce infection specifically. This seems reasonable sensible. And it appears debridement has been used to treat burns for some time. Indeed - apparently
> Manual debridement, often done by nurses or burn care technicians after wound cleansing, involves the scraping or pulling off of loose nonviable skin
The other question is whether it could be used as an option to reduce scarring. Debridement does appear to reduce scarring according to some papers. And some sites recommend it as a treatment to reduce scarring.
All the above is a _little_ vague as I am far from a medical expert, but I think it lays out what treatment appears to have been used, and that it is used to treat scarring. It appears Chuck was offered and took a form of regular manual debridement.