If you get carried away, or something goes horribly wrong, study old repairs. Making sure to study both the crappy old repairs and the good old repairs. Make a good repair. Then...give it some "distress".
My nearest gun-building pal, tells of the time his RR drill poked a hole in the bottom of the stock for a bespoke gun. He made a "wear patch" to cover it, and was ready to do a full re-stock for the guy. HE was distressed over messing up the stock.
The day of reckoning comes. He says the customer loved it, that it was his favorite part of the build. What's funny is that Mr. Anderson doesn't do "stressed" guns. Even after that.
Can get really time consuming with you have to convert to caps and then back to flint...