Often a bit of a Boo Boo can be left and made to look like wear and tear but the whole gun needs the same consideration to look right and is almost an art to come out looking used and not antique, Mike Brooks does it very well to my eye, also I only used scrapers, and burnished with antler as a final step on the last project I did and I really liked the bit more of a "primitive" finished project which was likley more the norm for the 18th century, the point made about not going to smooth before staining is one to keep in mind as well as whether one wants the gun to lok like the finish on a Mdl 70 or a Penn. longrifle, good luck on the "other guys" project and enjoy the journey.