Depending on the condition of the zinc plating on your spokes, polishing may be a good alternative.  Plating them requires taking your wheel completely apart, plating of the spokes and then relacing your wheels and truing.  It is a lot of work and for a rider likely more work and expense than you need.
I have been working on a couple of Dream wheels for a rider.  I used Flitz to polish the rims, then the hubs.  While working on the hubs I got some Flitz on a couple of spokes and when I hit them with the polishing wheel I was surprised how shiney they got.  
It is still a lot of work to polish your spokes, but I have been surprised how well ithey turn out.  It normally takes 4 -5 applications of Flitz, each time rubbing it on the spokes to reduce the oxidation and then wiping it off and polishing with the cloth.  I did 2 spokes at a time, front and back.  Be patient and keep repeating til they shine like chrome.  An old T-shirt works great.  You can also hit it with a cotton fabric polishing wheel in a drill to make it pop.  Not too much pressure.  The Flitz also leaves a protective coating.
			
							honda305.com Forum
Vintage Honda Owners, Restorers, Riders and Admirers
Latest Registry Entry
                        1965 Honda CP77 — Ulsan Metro City, Rep. Korea
                        Restored with original parts — Owner: J. Doe