Thanks everybody for the great advice.
I guess I'll start by cleaning everything thorughly, and try out the Militec free sample when it arrives. I have the Kuhnhausen shop manual on order, so when that comes, and I've read it a few times, I might be brave enough to venture into polishing.
If none of the above is satisfactory, the C&S trigger kit sounds like the way to go for me. The trigger isn't bad enough that I feel that Springfield should fix it free, and shipping it to them will probably set me back good chunk of change anyway (Isn't S&W's free service and shipping great!). Maybe I'll call them and ask their opinion.
As for the gunsmith: I'm going to be moving to the Bay Area to take the bar, and for my new job in about a month, so I'd love to know of good smiths up there, but this gun is sort of a father-son-son project, so kitchen-table gunsmithing, if effective, would be preferred.
Thanks again everybody. You are all an enorous help.