Dan,
Yes they will. Certain things are "doable" after the knife is completed and etching is one of them. As with any "repair" (it's considered a repair) the shop will get in touch with you prior to etching and give you a quote. Upon your acceptance they will proceed with the work. Hope this helps.
Best, Capt. Chris
_________________________
Capt.Chris Stanaback
RKCC/RKCA Founder
RKS #016
NRA Lifetime Member
CAPTSTANABACK@aol.com
WEBSITE: www.captstanaback.com