the shoe polish trick probably won't help ya here.
I think the best reference for someone to do it themselves is the Kunhaussen shop manual from brownells, very clearly details what the inlet should look like with pics and measurements. Makes it pretty easy to measure if an area of the stock is grossly out of spec.
as for who can bed it for you....... the only shop us m14 "gurus" seem to know about and be able to recommend is Tactical Ordnance , a sponsor here. Since I retired from all things related to the m14 (business/smithing ) I have been referring dozens of guys there and been thanked just as many times by guys happy with the outcome.
otherwise, have a gander at the m14 bedding video series that Tony Ben has compiled, with the info and techniques used by some of the top "real" m14 gurus in the USA.