I'll take a shot at this.

Don't do it. If J-frames are really your thing (I can't shoot them, hands are too big) then get a real one. By that I mean a older one made when Smith wasn't all about cutting corners (apologies to those who think today's Smiths are the cat's PJs).

As for your 36, you've been carrying it for years. It has character and proof of its loyal service. Don't wipe that out refinishing it. If you plan to carry the new gun (what ever you buy) instead of your current gun, keep it as a cherished memento. If you engrave it and refinish it it will probably just set in the safe anyway. No reason it can't set there as it is now, reminding you of its glory days.

My $.02 with. YMMV,
Dave

__________________
RSVN '69-'71
PCSD (Ret)